Initialize class variables with default values in scene/ [1/2]

62 files changed, 410 insertions, 762 deletions

diff --git a/scene/3d/area_3d.cpp b/scene/3d/area_3d.cpp
index 36312482cd..99c5276636 100644
--- a/scene/3d/area_3d.cpp
+++ b/scene/3d/area_3d.cpp
@@ -681,29 +681,10 @@ void Area3D::_bind_methods() {
 
 Area3D::Area3D() :
 		CollisionObject3D(PhysicsServer3D::get_singleton()->area_create(), true) {
-	space_override = SPACE_OVERRIDE_DISABLED;
 	set_gravity(9.8);
-	locked = false;
 	set_gravity_vector(Vector3(0, -1, 0));
-	gravity_is_point = false;
-	gravity_distance_scale = 0;
-	linear_damp = 0.1;
-	angular_damp = 0.1;
-	priority = 0;
-	monitoring = false;
-	monitorable = false;
-	collision_mask = 1;
-	collision_layer = 1;
 	set_monitoring(true);
 	set_monitorable(true);
-
-	audio_bus_override = false;
-	audio_bus = "Master";
-
-	use_reverb_bus = false;
-	reverb_bus = "Master";
-	reverb_amount = 0.0;
-	reverb_uniformity = 0.0;
 }
 
 Area3D::~Area3D() {
diff --git a/scene/3d/area_3d.h b/scene/3d/area_3d.h
index 5d8e1933ba..6d976115f7 100644
--- a/scene/3d/area_3d.h
+++ b/scene/3d/area_3d.h
@@ -47,19 +47,19 @@ public:
 	};
 
 private:
-	SpaceOverride space_override;
+	SpaceOverride space_override = SPACE_OVERRIDE_DISABLED;
 	Vector3 gravity_vec;
 	real_t gravity;
-	bool gravity_is_point;
-	real_t gravity_distance_scale;
-	real_t angular_damp;
-	real_t linear_damp;
-	uint32_t collision_mask;
-	uint32_t collision_layer;
-	int priority;
-	bool monitoring;
-	bool monitorable;
-	bool locked;
+	bool gravity_is_point = false;
+	real_t gravity_distance_scale = 0.0;
+	real_t angular_damp = 0.1;
+	real_t linear_damp = 0.1;
+	uint32_t collision_mask = 1;
+	uint32_t collision_layer = 1;
+	int priority = 0;
+	bool monitoring = false;
+	bool monitorable = false;
+	bool locked = false;
 
 	void _body_inout(int p_status, const RID &p_body, ObjectID p_instance, int p_body_shape, int p_area_shape);
 
@@ -67,8 +67,8 @@ private:
 	void _body_exit_tree(ObjectID p_id);
 
 	struct ShapePair {
-		int body_shape;
-		int area_shape;
+		int body_shape = 0;
+		int area_shape = 0;
 		bool operator<(const ShapePair &p_sp) const {
 			if (body_shape == p_sp.body_shape) {
 				return area_shape < p_sp.area_shape;
@@ -85,8 +85,8 @@ private:
 	};
 
 	struct BodyState {
-		int rc;
-		bool in_tree;
+		int rc = 0;
+		bool in_tree = false;
 		VSet<ShapePair> shapes;
 	};
 
@@ -98,8 +98,8 @@ private:
 	void _area_exit_tree(ObjectID p_id);
 
 	struct AreaShapePair {
-		int area_shape;
-		int self_shape;
+		int area_shape = 0;
+		int self_shape = 0;
 		bool operator<(const AreaShapePair &p_sp) const {
 			if (area_shape == p_sp.area_shape) {
 				return self_shape < p_sp.self_shape;
@@ -116,21 +116,21 @@ private:
 	};
 
 	struct AreaState {
-		int rc;
-		bool in_tree;
+		int rc = 0;
+		bool in_tree = false;
 		VSet<AreaShapePair> shapes;
 	};
 
 	Map<ObjectID, AreaState> area_map;
 	void _clear_monitoring();
 
-	bool audio_bus_override;
-	StringName audio_bus;
+	bool audio_bus_override = false;
+	StringName audio_bus = "Master";
 
-	bool use_reverb_bus;
-	StringName reverb_bus;
-	float reverb_amount;
-	float reverb_uniformity;
+	bool use_reverb_bus = false;
+	StringName reverb_bus = "Master";
+	float reverb_amount = 0.0;
+	float reverb_uniformity = 0.0;
 
 	void _validate_property(PropertyInfo &property) const override;
 
diff --git a/scene/3d/audio_stream_player_3d.cpp b/scene/3d/audio_stream_player_3d.cpp
index 2bcf898ced..fa8408ba5b 100644
--- a/scene/3d/audio_stream_player_3d.cpp
+++ b/scene/3d/audio_stream_player_3d.cpp
@@ -42,8 +42,8 @@ class Spcap {
 private:
 	struct Speaker {
 		Vector3 direction;
-		real_t effective_number_of_speakers; // precalculated
-		mutable real_t squared_gain; // temporary
+		real_t effective_number_of_speakers = 0; // precalculated
+		mutable real_t squared_gain = 0; // temporary
 	};
 
 	Vector<Speaker> speakers;
@@ -1002,31 +1002,6 @@ void AudioStreamPlayer3D::_bind_methods() {
 }
 
 AudioStreamPlayer3D::AudioStreamPlayer3D() {
-	unit_db = 0;
-	unit_size = 1;
-	attenuation_model = ATTENUATION_INVERSE_DISTANCE;
-	max_db = 3;
-	pitch_scale = 1.0;
-	autoplay = false;
-	setseek = -1;
-	active = false;
-	output_count = 0;
-	prev_output_count = 0;
-	max_distance = 0;
-	setplay = -1;
-	output_ready = false;
-	area_mask = 1;
-	emission_angle = 45;
-	emission_angle_enabled = false;
-	emission_angle_filter_attenuation_db = -12;
-	attenuation_filter_cutoff_hz = 5000;
-	attenuation_filter_db = -24;
-	out_of_range_mode = OUT_OF_RANGE_MIX;
-	doppler_tracking = DOPPLER_TRACKING_DISABLED;
-	stream_paused = false;
-	stream_paused_fade_in = false;
-	stream_paused_fade_out = false;
-
 	velocity_tracker.instance();
 	AudioServer::get_singleton()->connect("bus_layout_changed", callable_mp(this, &AudioStreamPlayer3D::_bus_layout_changed));
 	set_disable_scale(true);
diff --git a/scene/3d/audio_stream_player_3d.h b/scene/3d/audio_stream_player_3d.h
index bcfe2b2229..33ed758749 100644
--- a/scene/3d/audio_stream_player_3d.h
+++ b/scene/3d/audio_stream_player_3d.h
@@ -71,46 +71,39 @@ private:
 		AudioFilterSW filter;
 		AudioFilterSW::Processor filter_process[8];
 		AudioFrame vol[4];
-		float filter_gain;
-		float pitch_scale;
-		int bus_index;
-		int reverb_bus_index;
+		float filter_gain = 0.0;
+		float pitch_scale = 0.0;
+		int bus_index = -1;
+		int reverb_bus_index = -1;
 		AudioFrame reverb_vol[4];
-		Viewport *viewport; //pointer only used for reference to previous mix
-
-		Output() {
-			filter_gain = 0;
-			viewport = nullptr;
-			reverb_bus_index = -1;
-			bus_index = -1;
-		}
+		Viewport *viewport = nullptr; //pointer only used for reference to previous mix
 	};
 
 	Output outputs[MAX_OUTPUTS];
-	volatile int output_count;
-	volatile bool output_ready;
+	volatile int output_count = 0;
+	volatile bool output_ready = false;
 
 	//these are used by audio thread to have a reference of previous volumes (for ramping volume and avoiding clicks)
 	Output prev_outputs[MAX_OUTPUTS];
-	int prev_output_count;
+	int prev_output_count = 0;
 
 	Ref<AudioStreamPlayback> stream_playback;
 	Ref<AudioStream> stream;
 	Vector<AudioFrame> mix_buffer;
 
-	volatile float setseek;
-	volatile bool active;
-	volatile float setplay;
-
-	AttenuationModel attenuation_model;
-	float unit_db;
-	float unit_size;
-	float max_db;
-	float pitch_scale;
-	bool autoplay;
-	bool stream_paused;
-	bool stream_paused_fade_in;
-	bool stream_paused_fade_out;
+	volatile float setseek = -1.0;
+	volatile bool active = false;
+	volatile float setplay = -1.0;
+
+	AttenuationModel attenuation_model = ATTENUATION_INVERSE_DISTANCE;
+	float unit_db = 0.0;
+	float unit_size = 1.0;
+	float max_db = 3.0;
+	float pitch_scale = 1.0;
+	bool autoplay = false;
+	bool stream_paused = false;
+	bool stream_paused_fade_in = false;
+	bool stream_paused_fade_out = false;
 	StringName bus;
 
 	static void _calc_output_vol(const Vector3 &source_dir, real_t tightness, Output &output);
@@ -122,21 +115,21 @@ private:
 
 	void _bus_layout_changed();
 
-	uint32_t area_mask;
+	uint32_t area_mask = 1;
 
-	bool emission_angle_enabled;
-	float emission_angle;
-	float emission_angle_filter_attenuation_db;
-	float attenuation_filter_cutoff_hz;
-	float attenuation_filter_db;
+	bool emission_angle_enabled = false;
+	float emission_angle = 45.0;
+	float emission_angle_filter_attenuation_db = -12.0;
+	float attenuation_filter_cutoff_hz = 5000.0;
+	float attenuation_filter_db = -24.0;
 
-	float max_distance;
+	float max_distance = 0.0;
 
 	Ref<VelocityTracker3D> velocity_tracker;
 
-	DopplerTracking doppler_tracking;
+	DopplerTracking doppler_tracking = DOPPLER_TRACKING_DISABLED;
 
-	OutOfRangeMode out_of_range_mode;
+	OutOfRangeMode out_of_range_mode = OUT_OF_RANGE_MIX;
 
 	float _get_attenuation_db(float p_distance) const;
 
diff --git a/scene/3d/baked_lightmap.cpp b/scene/3d/baked_lightmap.cpp
index 14c8755d99..7c05878710 100644
--- a/scene/3d/baked_lightmap.cpp
+++ b/scene/3d/baked_lightmap.cpp
@@ -1466,17 +1466,4 @@ void BakedLightmap::_bind_methods() {
 }
 
 BakedLightmap::BakedLightmap() {
-	environment_mode = ENVIRONMENT_MODE_DISABLED;
-	environment_custom_color = Color(0.2, 0.7, 1.0);
-	environment_custom_energy = 1.0;
-
-	bake_quality = BAKE_QUALITY_MEDIUM;
-	interior = false;
-	directional = false;
-
-	gen_probes = GENERATE_PROBES_DISABLED;
-	use_denoiser = true;
-	bounces = 1;
-	bias = 0.0005;
-	max_texture_size = 16384;
 }
diff --git a/scene/3d/baked_lightmap.h b/scene/3d/baked_lightmap.h
index 7fd1cf892e..e2d89ab2d0 100644
--- a/scene/3d/baked_lightmap.h
+++ b/scene/3d/baked_lightmap.h
@@ -53,9 +53,9 @@ class BakedLightmapData : public Resource {
 
 	struct User {
 		NodePath path;
-		int32_t sub_instance;
+		int32_t sub_instance = 0;
 		Rect2 uv_scale;
-		int slice_index;
+		int slice_index = 0;
 	};
 
 	Vector<User> users;
@@ -136,32 +136,32 @@ public:
 	};
 
 private:
-	BakeQuality bake_quality;
-	bool use_denoiser;
-	int bounces;
-	float bias;
-	int max_texture_size;
-	bool interior;
-	EnvironmentMode environment_mode;
+	BakeQuality bake_quality = BAKE_QUALITY_MEDIUM;
+	bool use_denoiser = true;
+	int bounces = 1;
+	float bias = 0.0005;
+	int max_texture_size = 16384;
+	bool interior = false;
+	EnvironmentMode environment_mode = ENVIRONMENT_MODE_DISABLED;
 	Ref<Sky> environment_custom_sky;
-	Color environment_custom_color;
-	float environment_custom_energy;
-	bool directional;
-	GenerateProbes gen_probes;
+	Color environment_custom_color = Color(0.2, 0.7, 1.0);
+	float environment_custom_energy = 1.0;
+	bool directional = false;
+	GenerateProbes gen_probes = GENERATE_PROBES_DISABLED;
 
 	Ref<BakedLightmapData> light_data;
 
 	struct LightsFound {
 		Transform xform;
-		Light3D *light;
+		Light3D *light = nullptr;
 	};
 
 	struct MeshesFound {
 		Transform xform;
 		NodePath node_path;
-		int32_t subindex;
+		int32_t subindex = 0;
 		Ref<Mesh> mesh;
-		int32_t lightmap_scale;
+		int32_t lightmap_scale = 0;
 		Vector<Ref<Material>> overrides;
 	};
 
@@ -172,19 +172,20 @@ private:
 
 	struct BakeTimeData {
 		String text;
-		int pass;
-		uint64_t last_step;
+		int pass = 0;
+		uint64_t last_step = 0;
 	};
 
 	struct BSPSimplex {
-		int vertices[4];
-		int planes[4];
+		int vertices[4] = {};
+		int planes[4] = {};
 	};
 
 	struct BSPNode {
 		static const int32_t EMPTY_LEAF = INT32_MIN;
 		Plane plane;
-		int32_t over = EMPTY_LEAF, under = EMPTY_LEAF;
+		int32_t over = EMPTY_LEAF;
+		int32_t under = EMPTY_LEAF;
 	};
 
 	int _bsp_get_simplex_side(const Vector<Vector3> &p_points, const LocalVector<BSPSimplex> &p_simplices, const Plane &p_plane, uint32_t p_simplex) const;
@@ -192,16 +193,16 @@ private:
 
 	struct BakeStepUD {
 		Lightmapper::BakeStepFunc func;
-		void *ud;
-		float from_percent;
-		float to_percent;
+		void *ud = nullptr;
+		float from_percent = 0.0;
+		float to_percent = 0.0;
 	};
 
 	static bool _lightmap_bake_step_function(float p_completion, const String &p_text, void *ud, bool p_refresh);
 
 	struct GenProbesOctree {
 		Vector3i offset;
-		uint32_t size;
+		uint32_t size = 0;
 		GenProbesOctree *children[8] = { nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr };
 		~GenProbesOctree() {
 			for (int i = 0; i < 8; i++) {
diff --git a/scene/3d/bone_attachment_3d.cpp b/scene/3d/bone_attachment_3d.cpp
index 30fe1ecea8..5315e685a0 100644
--- a/scene/3d/bone_attachment_3d.cpp
+++ b/scene/3d/bone_attachment_3d.cpp
@@ -105,7 +105,6 @@ void BoneAttachment3D::_notification(int p_what) {
 }
 
 BoneAttachment3D::BoneAttachment3D() {
-	bound = false;
 }
 
 void BoneAttachment3D::_bind_methods() {
diff --git a/scene/3d/bone_attachment_3d.h b/scene/3d/bone_attachment_3d.h
index 0dddaa1028..0c6d5f12b1 100644
--- a/scene/3d/bone_attachment_3d.h
+++ b/scene/3d/bone_attachment_3d.h
@@ -36,7 +36,7 @@
 class BoneAttachment3D : public Node3D {
 	GDCLASS(BoneAttachment3D, Node3D);
 
-	bool bound;
+	bool bound = false;
 	String bone_name;
 
 	void _check_bind();
diff --git a/scene/3d/camera_3d.cpp b/scene/3d/camera_3d.cpp
index 53c3204b3e..fa9da6898c 100644
--- a/scene/3d/camera_3d.cpp
+++ b/scene/3d/camera_3d.cpp
@@ -653,24 +653,10 @@ Vector3 Camera3D::get_doppler_tracked_velocity() const {
 
 Camera3D::Camera3D() {
 	camera = RenderingServer::get_singleton()->camera_create();
-	size = 1;
-	fov = 0;
-	frustum_offset = Vector2();
-	near = 0;
-	far = 0;
-	current = false;
-	viewport = nullptr;
-	force_change = false;
-	mode = PROJECTION_PERSPECTIVE;
 	set_perspective(75.0, 0.05, 4000.0);
-	keep_aspect = KEEP_HEIGHT;
-	layers = 0xfffff;
-	v_offset = 0;
-	h_offset = 0;
 	RenderingServer::get_singleton()->camera_set_cull_mask(camera, layers);
 	//active=false;
 	velocity_tracker.instance();
-	doppler_tracking = DOPPLER_TRACKING_DISABLED;
 	set_notify_transform(true);
 	set_disable_scale(true);
 }
@@ -882,16 +868,10 @@ void ClippedCamera3D::_bind_methods() {
 }
 
 ClippedCamera3D::ClippedCamera3D() {
-	margin = 0;
-	clip_offset = 0;
-	process_mode = CLIP_PROCESS_PHYSICS;
 	set_physics_process_internal(true);
-	collision_mask = 1;
 	set_notify_local_transform(Engine::get_singleton()->is_editor_hint());
 	points.resize(5);
 	pyramid_shape = PhysicsServer3D::get_singleton()->shape_create(PhysicsServer3D::SHAPE_CONVEX_POLYGON);
-	clip_to_areas = false;
-	clip_to_bodies = true;
 }
 
 ClippedCamera3D::~ClippedCamera3D() {
diff --git a/scene/3d/camera_3d.h b/scene/3d/camera_3d.h
index aa36c8800d..06bb55e23c 100644
--- a/scene/3d/camera_3d.h
+++ b/scene/3d/camera_3d.h
@@ -57,26 +57,27 @@ public:
 	};
 
 private:
-	bool force_change;
-	bool current;
-	Viewport *viewport;
+	bool force_change = false;
+	bool current = false;
+	Viewport *viewport = nullptr;
 
-	Projection mode;
+	Projection mode = PROJECTION_PERSPECTIVE;
 
-	float fov;
-	float size;
+	float fov = 0.0;
+	float size = 1.0;
 	Vector2 frustum_offset;
-	float near, far;
-	float v_offset;
-	float h_offset;
-	KeepAspect keep_aspect;
+	float near = 0.0;
+	float far = 0.0;
+	float v_offset = 0.0;
+	float h_offset = 0.0;
+	KeepAspect keep_aspect = KEEP_HEIGHT;
 
 	RID camera;
 	RID scenario_id;
 
 	// String camera_group;
 
-	uint32_t layers;
+	uint32_t layers = 0xfffff;
 
 	Ref<Environment> environment;
 	Ref<CameraEffects> effects;
@@ -87,7 +88,7 @@ private:
 	friend class Viewport;
 	void _update_audio_listener_state();
 
-	DopplerTracking doppler_tracking;
+	DopplerTracking doppler_tracking = DOPPLER_TRACKING_DISABLED;
 	Ref<VelocityTracker3D> velocity_tracker;
 
 protected:
@@ -191,13 +192,13 @@ public:
 	};
 
 private:
-	ProcessMode process_mode;
+	ProcessMode process_mode = CLIP_PROCESS_PHYSICS;
 	RID pyramid_shape;
-	float margin;
-	float clip_offset;
-	uint32_t collision_mask;
-	bool clip_to_areas;
-	bool clip_to_bodies;
+	float margin = 0.0;
+	float clip_offset = 0.0;
+	uint32_t collision_mask = 1;
+	bool clip_to_areas = false;
+	bool clip_to_bodies = true;
 
 	Set<RID> exclude;
 
diff --git a/scene/3d/collision_object_3d.cpp b/scene/3d/collision_object_3d.cpp
index f1d7ac64b2..b7da4822e2 100644
--- a/scene/3d/collision_object_3d.cpp
+++ b/scene/3d/collision_object_3d.cpp
@@ -325,10 +325,7 @@ uint32_t CollisionObject3D::shape_find_owner(int p_shape_index) const {
 CollisionObject3D::CollisionObject3D(RID p_rid, bool p_area) {
 	rid = p_rid;
 	area = p_area;
-	capture_input_on_drag = false;
-	ray_pickable = true;
 	set_notify_transform(true);
-	total_subshapes = 0;
 
 	if (p_area) {
 		PhysicsServer3D::get_singleton()->area_attach_object_instance_id(rid, get_instance_id());
@@ -360,8 +357,6 @@ String CollisionObject3D::get_configuration_warning() const {
 }
 
 CollisionObject3D::CollisionObject3D() {
-	capture_input_on_drag = false;
-	ray_pickable = true;
 	set_notify_transform(true);
 	//owner=
 
diff --git a/scene/3d/collision_object_3d.h b/scene/3d/collision_object_3d.h
index da65791b9c..b7473ca12a 100644
--- a/scene/3d/collision_object_3d.h
+++ b/scene/3d/collision_object_3d.h
@@ -37,33 +37,28 @@
 class CollisionObject3D : public Node3D {
 	GDCLASS(CollisionObject3D, Node3D);
 
-	bool area;
+	bool area = false;
 
 	RID rid;
 
 	struct ShapeData {
-		Object *owner;
+		Object *owner = nullptr;
 		Transform xform;
 		struct ShapeBase {
 			Ref<Shape3D> shape;
-			int index;
+			int index = 0;
 		};
 
 		Vector<ShapeBase> shapes;
-		bool disabled;
-
-		ShapeData() {
-			disabled = false;
-			owner = nullptr;
-		}
+		bool disabled = false;
 	};
 
-	int total_subshapes;
+	int total_subshapes = 0;
 
 	Map<uint32_t, ShapeData> shapes;
 
-	bool capture_input_on_drag;
-	bool ray_pickable;
+	bool capture_input_on_drag = false;
+	bool ray_pickable = true;
 
 	void _update_pickable();
 
diff --git a/scene/3d/collision_polygon_3d.cpp b/scene/3d/collision_polygon_3d.cpp
index 742387b32d..4d117f02d3 100644
--- a/scene/3d/collision_polygon_3d.cpp
+++ b/scene/3d/collision_polygon_3d.cpp
@@ -197,10 +197,5 @@ void CollisionPolygon3D::_bind_methods() {
 }
 
 CollisionPolygon3D::CollisionPolygon3D() {
-	aabb = AABB(Vector3(-1, -1, -1), Vector3(2, 2, 2));
-	depth = 1.0;
 	set_notify_local_transform(true);
-	parent = nullptr;
-	owner_id = 0;
-	disabled = false;
 }
diff --git a/scene/3d/collision_polygon_3d.h b/scene/3d/collision_polygon_3d.h
index ba6ad2a3f0..cb0aba67b1 100644
--- a/scene/3d/collision_polygon_3d.h
+++ b/scene/3d/collision_polygon_3d.h
@@ -39,14 +39,14 @@ class CollisionPolygon3D : public Node3D {
 	GDCLASS(CollisionPolygon3D, Node3D);
 
 protected:
-	real_t depth;
-	AABB aabb;
+	real_t depth = 1.0;
+	AABB aabb = AABB(Vector3(-1, -1, -1), Vector3(2, 2, 2));
 	Vector<Point2> polygon;
 
-	uint32_t owner_id;
-	CollisionObject3D *parent;
+	uint32_t owner_id = 0;
+	CollisionObject3D *parent = nullptr;
 
-	bool disabled;
+	bool disabled = false;
 
 	void _build_polygon();
 
diff --git a/scene/3d/collision_shape_3d.cpp b/scene/3d/collision_shape_3d.cpp
index 503d1be104..928a46aba5 100644
--- a/scene/3d/collision_shape_3d.cpp
+++ b/scene/3d/collision_shape_3d.cpp
@@ -213,10 +213,6 @@ bool CollisionShape3D::is_disabled() const {
 
 CollisionShape3D::CollisionShape3D() {
 	//indicator = RenderingServer::get_singleton()->mesh_create();
-	disabled = false;
-	debug_shape = nullptr;
-	parent = nullptr;
-	owner_id = 0;
 	set_notify_local_transform(true);
 }
 
diff --git a/scene/3d/collision_shape_3d.h b/scene/3d/collision_shape_3d.h
index 5f556b01a9..f55c09ffaa 100644
--- a/scene/3d/collision_shape_3d.h
+++ b/scene/3d/collision_shape_3d.h
@@ -40,14 +40,14 @@ class CollisionShape3D : public Node3D {
 
 	Ref<Shape3D> shape;
 
-	uint32_t owner_id;
-	CollisionObject3D *parent;
+	uint32_t owner_id = 0;
+	CollisionObject3D *parent = nullptr;
 
-	Node *debug_shape;
+	Node *debug_shape = nullptr;
 	bool debug_shape_dirty;
 
 	void resource_changed(RES res);
-	bool disabled;
+	bool disabled = false;
 
 protected:
 	void _update_debug_shape();
diff --git a/scene/3d/cpu_particles_3d.cpp b/scene/3d/cpu_particles_3d.cpp
index 85b502e7a0..48fdeb051d 100644
--- a/scene/3d/cpu_particles_3d.cpp
+++ b/scene/3d/cpu_particles_3d.cpp
@@ -1445,13 +1445,6 @@ void CPUParticles3D::_bind_methods() {
 }
 
 CPUParticles3D::CPUParticles3D() {
-	time = 0;
-	inactive_time = 0;
-	frame_remainder = 0;
-	cycle = 0;
-	redraw = false;
-	emitting = false;
-
 	set_notify_transform(true);
 
 	multimesh = RenderingServer::get_singleton()->multimesh_create();
@@ -1459,23 +1452,8 @@ CPUParticles3D::CPUParticles3D() {
 	set_base(multimesh);
 
 	set_emitting(true);
-	set_one_shot(false);
 	set_amount(8);
-	set_lifetime(1);
-	set_fixed_fps(0);
-	set_fractional_delta(true);
-	set_pre_process_time(0);
-	set_explosiveness_ratio(0);
-	set_randomness_ratio(0);
-	set_lifetime_randomness(0);
-	set_use_local_coordinates(true);
-
-	set_draw_order(DRAW_ORDER_INDEX);
-	set_speed_scale(1);
-
-	set_direction(Vector3(1, 0, 0));
-	set_spread(45);
-	set_flatness(0);
+
 	set_param(PARAM_INITIAL_LINEAR_VELOCITY, 0);
 	set_param(PARAM_ANGULAR_VELOCITY, 0);
 	set_param(PARAM_ORBIT_VELOCITY, 0);
@@ -1488,23 +1466,6 @@ CPUParticles3D::CPUParticles3D() {
 	set_param(PARAM_HUE_VARIATION, 0);
 	set_param(PARAM_ANIM_SPEED, 0);
 	set_param(PARAM_ANIM_OFFSET, 0);
-	set_emission_shape(EMISSION_SHAPE_POINT);
-	set_emission_sphere_radius(1);
-	set_emission_box_extents(Vector3(1, 1, 1));
-
-	set_gravity(Vector3(0, -9.8, 0));
-
-	for (int i = 0; i < PARAM_MAX; i++) {
-		set_param_randomness(Parameter(i), 0);
-	}
-
-	for (int i = 0; i < PARTICLE_FLAG_MAX; i++) {
-		particle_flags[i] = false;
-	}
-
-	can_update = false;
-
-	set_color(Color(1, 1, 1, 1));
 }
 
 CPUParticles3D::~CPUParticles3D() {
diff --git a/scene/3d/cpu_particles_3d.h b/scene/3d/cpu_particles_3d.h
index 3ee03ff3d8..d650bf95ac 100644
--- a/scene/3d/cpu_particles_3d.h
+++ b/scene/3d/cpu_particles_3d.h
@@ -78,30 +78,30 @@ public:
 	};
 
 private:
-	bool emitting;
+	bool emitting = false;
 
 	struct Particle {
 		Transform transform;
 		Color color;
-		float custom[4];
+		float custom[4] = {};
 		Vector3 velocity;
-		bool active;
-		float angle_rand;
-		float scale_rand;
-		float hue_rot_rand;
-		float anim_offset_rand;
-		float time;
-		float lifetime;
+		bool active = false;
+		float angle_rand = 0.0;
+		float scale_rand = 0.0;
+		float hue_rot_rand = 0.0;
+		float anim_offset_rand = 0.0;
+		float time = 0.0;
+		float lifetime = 0.0;
 		Color base_color;
 
-		uint32_t seed;
+		uint32_t seed = 0;
 	};
 
-	float time;
-	float inactive_time;
-	float frame_remainder;
-	int cycle;
-	bool redraw;
+	float time = 0.0;
+	float inactive_time = 0.0;
+	float frame_remainder = 0.0;
+	int cycle = 0;
+	bool redraw = false;
 
 	RID multimesh;
 
@@ -110,7 +110,7 @@ private:
 	Vector<int> particle_order;
 
 	struct SortLifetime {
-		const Particle *particles;
+		const Particle *particles = nullptr;
 
 		bool operator()(int p_a, int p_b) const {
 			return particles[p_a].time > particles[p_b].time;
@@ -118,7 +118,7 @@ private:
 	};
 
 	struct SortAxis {
-		const Particle *particles;
+		const Particle *particles = nullptr;
 		Vector3 axis;
 		bool operator()(int p_a, int p_b) const {
 			return axis.dot(particles[p_a].transform.origin) < axis.dot(particles[p_b].transform.origin);
@@ -127,50 +127,50 @@ private:
 
 	//
 
-	bool one_shot;
+	bool one_shot = false;
 
-	float lifetime;
-	float pre_process_time;
-	float explosiveness_ratio;
-	float randomness_ratio;
-	float lifetime_randomness;
-	float speed_scale;
-	bool local_coords;
-	int fixed_fps;
-	bool fractional_delta;
+	float lifetime = 1.0;
+	float pre_process_time = 0.0;
+	float explosiveness_ratio = 0.0;
+	float randomness_ratio = 0.0;
+	float lifetime_randomness = 0.0;
+	float speed_scale = 1.0;
+	bool local_coords = true;
+	int fixed_fps = 0;
+	bool fractional_delta = true;
 
 	Transform inv_emission_transform;
 
-	volatile bool can_update;
+	volatile bool can_update = false;
 
-	DrawOrder draw_order;
+	DrawOrder draw_order = DRAW_ORDER_INDEX;
 
 	Ref<Mesh> mesh;
 
 	////////
 
-	Vector3 direction;
-	float spread;
-	float flatness;
+	Vector3 direction = Vector3(1, 0, 0);
+	float spread = 45.0;
+	float flatness = 0.0;
 
 	float parameters[PARAM_MAX];
-	float randomness[PARAM_MAX];
+	float randomness[PARAM_MAX] = {};
 
 	Ref<Curve> curve_parameters[PARAM_MAX];
-	Color color;
+	Color color = Color(1, 1, 1, 1);
 	Ref<Gradient> color_ramp;
 
-	bool particle_flags[PARTICLE_FLAG_MAX];
+	bool particle_flags[PARTICLE_FLAG_MAX] = {};
 
-	EmissionShape emission_shape;
-	float emission_sphere_radius;
-	Vector3 emission_box_extents;
+	EmissionShape emission_shape = EMISSION_SHAPE_POINT;
+	float emission_sphere_radius = 1.0;
+	Vector3 emission_box_extents = Vector3(1, 1, 1);
 	Vector<Vector3> emission_points;
 	Vector<Vector3> emission_normals;
 	Vector<Color> emission_colors;
-	int emission_point_count;
+	int emission_point_count = 0;
 
-	Vector3 gravity;
+	Vector3 gravity = Vector3(0, -9.8, 0);
 
 	void _update_internal();
 	void _particles_process(float p_delta);
diff --git a/scene/3d/decal.cpp b/scene/3d/decal.cpp
index e67802cfc4..1cdea37dad 100644
--- a/scene/3d/decal.cpp
+++ b/scene/3d/decal.cpp
@@ -220,18 +220,6 @@ void Decal::_bind_methods() {
 }
 
 Decal::Decal() {
-	extents = Vector3(1, 1, 1);
-	emission_energy = 1.0;
-	modulate = Color(1, 1, 1, 1);
-	albedo_mix = 1.0;
-	cull_mask = (1 << 20) - 1;
-	upper_fade = 0.3;
-	lower_fade = 0.3;
-	normal_fade = 0;
-	distance_fade_enabled = false;
-	distance_fade_begin = 10;
-	distance_fade_length = 1;
-
 	decal = RenderingServer::get_singleton()->decal_create();
 	RS::get_singleton()->instance_set_base(get_instance(), decal);
 }
diff --git a/scene/3d/decal.h b/scene/3d/decal.h
index 500a1425f2..095579d775 100644
--- a/scene/3d/decal.h
+++ b/scene/3d/decal.h
@@ -49,18 +49,18 @@ public:
 
 private:
 	RID decal;
-	Vector3 extents;
+	Vector3 extents = Vector3(1, 1, 1);
 	Ref<Texture2D> textures[TEXTURE_MAX];
-	float emission_energy;
-	float albedo_mix;
-	Color modulate;
-	uint32_t cull_mask;
-	float normal_fade;
-	float upper_fade;
-	float lower_fade;
-	bool distance_fade_enabled;
-	float distance_fade_begin;
-	float distance_fade_length;
+	float emission_energy = 1.0;
+	float albedo_mix = 1.0;
+	Color modulate = Color(1, 1, 1, 1);
+	uint32_t cull_mask = (1 << 20) - 1;
+	float normal_fade = 0.0;
+	float upper_fade = 0.3;
+	float lower_fade = 0.3;
+	bool distance_fade_enabled = false;
+	float distance_fade_begin = 10.0;
+	float distance_fade_length = 1.0;
 
 protected:
 	static void _bind_methods();
diff --git a/scene/3d/gi_probe.cpp b/scene/3d/gi_probe.cpp
index 0565193437..1f00eab092 100644
--- a/scene/3d/gi_probe.cpp
+++ b/scene/3d/gi_probe.cpp
@@ -286,17 +286,6 @@ void GIProbeData::_bind_methods() {
 }
 
 GIProbeData::GIProbeData() {
-	ao = 0.0;
-	ao_size = 0.5;
-	dynamic_range = 4;
-	energy = 1.0;
-	bias = 1.5;
-	normal_bias = 0.0;
-	propagation = 0.7;
-	anisotropy_strength = 0.5;
-	interior = false;
-	use_two_bounces = false;
-
 	probe = RS::get_singleton()->gi_probe_create();
 }
 
@@ -553,9 +542,6 @@ void GIProbe::_bind_methods() {
 }
 
 GIProbe::GIProbe() {
-	subdiv = SUBDIV_128;
-	extents = Vector3(10, 10, 10);
-
 	gi_probe = RS::get_singleton()->gi_probe_create();
 	set_disable_scale(true);
 }
diff --git a/scene/3d/gi_probe.h b/scene/3d/gi_probe.h
index afea94fe12..534b425557 100644
--- a/scene/3d/gi_probe.h
+++ b/scene/3d/gi_probe.h
@@ -46,16 +46,16 @@ class GIProbeData : public Resource {
 	AABB bounds;
 	Vector3 octree_size;
 
-	float dynamic_range;
-	float energy;
-	float bias;
-	float normal_bias;
-	float propagation;
-	float anisotropy_strength;
-	float ao;
-	float ao_size;
-	bool interior;
-	bool use_two_bounces;
+	float dynamic_range = 4.0;
+	float energy = 1.0;
+	float bias = 1.5;
+	float normal_bias = 0.0;
+	float propagation = 0.7;
+	float anisotropy_strength = 0.5;
+	float ao = 0.0;
+	float ao_size = 0.5;
+	bool interior = false;
+	bool use_two_bounces = false;
 
 protected:
 	static void _bind_methods();
@@ -129,8 +129,8 @@ private:
 
 	RID gi_probe;
 
-	Subdiv subdiv;
-	Vector3 extents;
+	Subdiv subdiv = SUBDIV_128;
+	Vector3 extents = Vector3(10, 10, 10);
 
 	struct PlotMesh {
 		Ref<Material> override_material;
diff --git a/scene/3d/gpu_particles_collision_3d.h b/scene/3d/gpu_particles_collision_3d.h
index 7d6301ee50..81c33663f3 100644
--- a/scene/3d/gpu_particles_collision_3d.h
+++ b/scene/3d/gpu_particles_collision_3d.h
@@ -130,16 +130,16 @@ private:
 			LEAF_MASK = LEAF_BIT - 1
 		};
 		AABB bounds;
-		uint32_t children[2];
+		uint32_t children[2] = {};
 	};
 
 	struct FacePos {
 		Vector3 center;
-		uint32_t index;
+		uint32_t index = 0;
 	};
 
 	struct FaceSort {
-		uint32_t axis;
+		uint32_t axis = 0;
 		bool operator()(const FacePos &p_left, const FacePos &p_right) const {
 			return p_left.center[axis] < p_right.center[axis];
 		}
@@ -148,13 +148,13 @@ private:
 	uint32_t _create_bvh(LocalVector<BVH> &bvh_tree, FacePos *p_faces, uint32_t p_face_count, const Face3 *p_triangles, float p_thickness);
 
 	struct ComputeSDFParams {
-		float *cells;
+		float *cells = nullptr;
 		Vector3i size;
-		float cell_size;
+		float cell_size = 0.0;
 		Vector3 cell_offset;
-		const BVH *bvh;
-		const Face3 *triangles;
-		float thickness;
+		const BVH *bvh = nullptr;
+		const Face3 *triangles = nullptr;
+		float thickness = 0.0;
 	};
 
 	void _find_closest_distance(const Vector3 &p_pos, const BVH *bvh, uint32_t p_bvh_cell, const Face3 *triangles, float thickness, float &closest_distance);
diff --git a/scene/3d/immediate_geometry_3d.cpp b/scene/3d/immediate_geometry_3d.cpp
index 47242cf196..d64babaa9d 100644
--- a/scene/3d/immediate_geometry_3d.cpp
+++ b/scene/3d/immediate_geometry_3d.cpp
@@ -150,7 +150,6 @@ void ImmediateGeometry3D::_bind_methods() {
 ImmediateGeometry3D::ImmediateGeometry3D() {
 	im = RenderingServer::get_singleton()->immediate_create();
 	set_base(im);
-	empty = true;
 }
 
 ImmediateGeometry3D::~ImmediateGeometry3D() {
diff --git a/scene/3d/immediate_geometry_3d.h b/scene/3d/immediate_geometry_3d.h
index 8e546e27e7..ee4938d9f7 100644
--- a/scene/3d/immediate_geometry_3d.h
+++ b/scene/3d/immediate_geometry_3d.h
@@ -41,7 +41,7 @@ class ImmediateGeometry3D : public GeometryInstance3D {
 	//a list of textures drawn need to be kept, to avoid references
 	// in RenderingServer from becoming invalid if the texture is no longer used
 	List<Ref<Texture2D>> cached_textures;
-	bool empty;
+	bool empty = true;
 	AABB aabb;
 
 protected:
diff --git a/scene/3d/light_3d.cpp b/scene/3d/light_3d.cpp
index 1571b07aca..e6e23b927a 100644
--- a/scene/3d/light_3d.cpp
+++ b/scene/3d/light_3d.cpp
@@ -324,10 +324,6 @@ Light3D::Light3D(RenderingServer::LightType p_type) {
 
 	RS::get_singleton()->instance_set_base(get_instance(), light);
 
-	reverse_cull = false;
-	bake_mode = BAKE_DYNAMIC;
-
-	editor_only = false;
 	set_color(Color(1, 1, 1, 1));
 	set_shadow(false);
 	set_negative(false);
@@ -357,7 +353,6 @@ Light3D::Light3D(RenderingServer::LightType p_type) {
 }
 
 Light3D::Light3D() {
-	type = RenderingServer::LIGHT_DIRECTIONAL;
 	ERR_PRINT("Light3D should not be instanced directly; use the DirectionalLight3D, OmniLight3D or SpotLight3D subtypes instead.");
 }
 
diff --git a/scene/3d/light_3d.h b/scene/3d/light_3d.h
index 833598c4a1..311db54bce 100644
--- a/scene/3d/light_3d.h
+++ b/scene/3d/light_3d.h
@@ -71,16 +71,16 @@ public:
 
 private:
 	Color color;
-	float param[PARAM_MAX];
+	float param[PARAM_MAX] = {};
 	Color shadow_color;
-	bool shadow;
-	bool negative;
-	bool reverse_cull;
-	uint32_t cull_mask;
-	RS::LightType type;
-	bool editor_only;
+	bool shadow = false;
+	bool negative = false;
+	bool reverse_cull = false;
+	uint32_t cull_mask = 0;
+	RS::LightType type = RenderingServer::LIGHT_DIRECTIONAL;
+	bool editor_only = false;
 	void _update_visibility();
-	BakeMode bake_mode;
+	BakeMode bake_mode = BAKE_DYNAMIC;
 	Ref<Texture2D> projector;
 
 	// bind helpers
diff --git a/scene/3d/listener_3d.cpp b/scene/3d/listener_3d.cpp
index 23adb0aa19..9842f152d7 100644
--- a/scene/3d/listener_3d.cpp
+++ b/scene/3d/listener_3d.cpp
@@ -159,8 +159,6 @@ void Listener3D::_bind_methods() {
 }
 
 Listener3D::Listener3D() {
-	current = false;
-	force_change = false;
 	set_notify_transform(true);
 	//active=false;
 }
diff --git a/scene/3d/listener_3d.h b/scene/3d/listener_3d.h
index 2a78efb2c7..85657a8e53 100644
--- a/scene/3d/listener_3d.h
+++ b/scene/3d/listener_3d.h
@@ -38,8 +38,8 @@ class Listener3D : public Node3D {
 	GDCLASS(Listener3D, Node3D);
 
 private:
-	bool force_change;
-	bool current;
+	bool force_change = false;
+	bool current = false;
 
 	RID scenario_id;
 
diff --git a/scene/3d/mesh_instance_3d.cpp b/scene/3d/mesh_instance_3d.cpp
index 44dd6e0e5f..9029b5b028 100644
--- a/scene/3d/mesh_instance_3d.cpp
+++ b/scene/3d/mesh_instance_3d.cpp
@@ -428,7 +428,6 @@ void MeshInstance3D::_bind_methods() {
 }
 
 MeshInstance3D::MeshInstance3D() {
-	skeleton_path = NodePath("..");
 }
 
 MeshInstance3D::~MeshInstance3D() {
diff --git a/scene/3d/mesh_instance_3d.h b/scene/3d/mesh_instance_3d.h
index 822e04e656..eb300784b1 100644
--- a/scene/3d/mesh_instance_3d.h
+++ b/scene/3d/mesh_instance_3d.h
@@ -44,15 +44,11 @@ protected:
 	Ref<Skin> skin;
 	Ref<Skin> skin_internal;
 	Ref<SkinReference> skin_ref;
-	NodePath skeleton_path;
+	NodePath skeleton_path = NodePath("..");
 
 	struct BlendShapeTrack {
-		int idx;
-		float value;
-		BlendShapeTrack() {
-			idx = 0;
-			value = 0;
-		}
+		int idx = 0;
+		float value = 0.0;
 	};
 
 	Map<StringName, BlendShapeTrack> blend_shape_tracks;
diff --git a/scene/3d/navigation_3d.cpp b/scene/3d/navigation_3d.cpp
index 2a7195be1a..eaddec7601 100644
--- a/scene/3d/navigation_3d.cpp
+++ b/scene/3d/navigation_3d.cpp
@@ -110,8 +110,6 @@ Navigation3D::Navigation3D() {
 
 	set_cell_size(0.3);
 	set_edge_connection_margin(5.0); // Five meters, depends a lot on the agent's radius
-
-	up = Vector3(0, 1, 0);
 }
 
 Navigation3D::~Navigation3D() {
diff --git a/scene/3d/navigation_3d.h b/scene/3d/navigation_3d.h
index 3e8adaf5ff..b89725a3f5 100644
--- a/scene/3d/navigation_3d.h
+++ b/scene/3d/navigation_3d.h
@@ -39,7 +39,7 @@ class Navigation3D : public Node3D {
 
 	RID map;
 
-	Vector3 up;
+	Vector3 up = Vector3(0, 1, 0);
 	real_t cell_size;
 	real_t edge_connection_margin;
 
diff --git a/scene/3d/navigation_region_3d.cpp b/scene/3d/navigation_region_3d.cpp
index e8cfa05a4b..a9acaefc65 100644
--- a/scene/3d/navigation_region_3d.cpp
+++ b/scene/3d/navigation_region_3d.cpp
@@ -150,7 +150,7 @@ Ref<NavigationMesh> NavigationRegion3D::get_navigation_mesh() const {
 }
 
 struct BakeThreadsArgs {
-	NavigationRegion3D *nav_region;
+	NavigationRegion3D *nav_region = nullptr;
 };
 
 void _bake_navigation_mesh(void *p_user_data) {
diff --git a/scene/3d/path_3d.h b/scene/3d/path_3d.h
index 15e38c95e7..17ee47593e 100644
--- a/scene/3d/path_3d.h
+++ b/scene/3d/path_3d.h
@@ -66,10 +66,10 @@ public:
 
 private:
 	Path3D *path = nullptr;
-	real_t delta_offset = 0; // Change in offset since last _update_transform.
-	real_t offset = 0;
-	real_t h_offset = 0;
-	real_t v_offset = 0;
+	real_t delta_offset = 0.0; // Change in offset since last _update_transform.
+	real_t offset = 0.0;
+	real_t h_offset = 0.0;
+	real_t v_offset = 0.0;
 	bool cubic = true;
 	bool loop = true;
 	RotationMode rotation_mode = ROTATION_XYZ;
diff --git a/scene/3d/physics_body_3d.cpp b/scene/3d/physics_body_3d.cpp
index 71be943232..367dd7ec91 100644
--- a/scene/3d/physics_body_3d.cpp
+++ b/scene/3d/physics_body_3d.cpp
@@ -330,8 +330,8 @@ void RigidBody3D::_body_inout(int p_status, ObjectID p_instance, int p_body_shap
 
 struct _RigidBodyInOut {
 	ObjectID id;
-	int shape;
-	int local_shape;
+	int shape = 0;
+	int local_shape = 0;
 };
 
 void RigidBody3D::_direct_state_changed(Object *p_state) {
@@ -825,24 +825,6 @@ void RigidBody3D::_bind_methods() {
 
 RigidBody3D::RigidBody3D() :
 		PhysicsBody3D(PhysicsServer3D::BODY_MODE_RIGID) {
-	mode = MODE_RIGID;
-
-	mass = 1;
-	max_contacts_reported = 0;
-	state = nullptr;
-
-	gravity_scale = 1;
-	linear_damp = -1;
-	angular_damp = -1;
-
-	//angular_velocity=0;
-	sleeping = false;
-	ccd = false;
-
-	custom_integrator = false;
-	contact_monitor = nullptr;
-	can_sleep = true;
-
 	PhysicsServer3D::get_singleton()->body_set_force_integration_callback(get_rid(), this, "_direct_state_changed");
 }
 
@@ -1221,11 +1203,6 @@ void KinematicBody3D::_direct_state_changed(Object *p_state) {
 
 KinematicBody3D::KinematicBody3D() :
 		PhysicsBody3D(PhysicsServer3D::BODY_MODE_KINEMATIC) {
-	locked_axis = 0;
-	on_floor = false;
-	on_ceiling = false;
-	on_wall = false;
-
 	set_safe_margin(0.001);
 	PhysicsServer3D::get_singleton()->body_set_force_integration_callback(get_rid(), this, "_direct_state_changed");
 }
diff --git a/scene/3d/physics_body_3d.h b/scene/3d/physics_body_3d.h
index 469c6b222c..1450fce6a6 100644
--- a/scene/3d/physics_body_3d.h
+++ b/scene/3d/physics_body_3d.h
@@ -111,31 +111,31 @@ public:
 	};
 
 protected:
-	bool can_sleep;
-	PhysicsDirectBodyState3D *state;
-	Mode mode;
+	bool can_sleep = true;
+	PhysicsDirectBodyState3D *state = nullptr;
+	Mode mode = MODE_RIGID;
 
-	real_t mass;
+	real_t mass = 1.0;
 	Ref<PhysicsMaterial> physics_material_override;
 
 	Vector3 linear_velocity;
 	Vector3 angular_velocity;
 	Basis inverse_inertia_tensor;
-	real_t gravity_scale;
-	real_t linear_damp;
-	real_t angular_damp;
+	real_t gravity_scale = 1.0;
+	real_t linear_damp = -1.0;
+	real_t angular_damp = -1.0;
 
-	bool sleeping;
-	bool ccd;
+	bool sleeping = false;
+	bool ccd = false;
 
-	int max_contacts_reported;
+	int max_contacts_reported = 0;
 
-	bool custom_integrator;
+	bool custom_integrator = false;
 
 	struct ShapePair {
-		int body_shape;
-		int local_shape;
-		bool tagged;
+		int body_shape = 0;
+		int local_shape = 0;
+		bool tagged = false;
 		bool operator<(const ShapePair &p_sp) const {
 			if (body_shape == p_sp.body_shape) {
 				return local_shape < p_sp.local_shape;
@@ -157,16 +157,16 @@ protected:
 	};
 	struct BodyState {
 		//int rc;
-		bool in_tree;
+		bool in_tree = false;
 		VSet<ShapePair> shapes;
 	};
 
 	struct ContactMonitor {
-		bool locked;
+		bool locked = false;
 		Map<ObjectID, BodyState> body_map;
 	};
 
-	ContactMonitor *contact_monitor;
+	ContactMonitor *contact_monitor = nullptr;
 	void _body_enter_tree(ObjectID p_id);
 	void _body_exit_tree(ObjectID p_id);
 
@@ -261,27 +261,27 @@ public:
 		Vector3 collider_vel;
 		ObjectID collider;
 		RID collider_rid;
-		int collider_shape;
+		int collider_shape = 0;
 		Variant collider_metadata;
 		Vector3 remainder;
 		Vector3 travel;
-		int local_shape;
+		int local_shape = 0;
 	};
 
 private:
 	Vector3 linear_velocity;
 	Vector3 angular_velocity;
 
-	uint16_t locked_axis;
+	uint16_t locked_axis = 0;
 
 	real_t margin;
 
 	Vector3 floor_normal;
 	Vector3 floor_velocity;
 	RID on_floor_body;
-	bool on_floor;
-	bool on_ceiling;
-	bool on_wall;
+	bool on_floor = false;
+	bool on_ceiling = false;
+	bool on_wall = false;
 	Vector<Collision> colliders;
 	Vector<Ref<KinematicCollision3D>> slide_colliders;
 	Ref<KinematicCollision3D> motion_cache;
@@ -385,10 +385,8 @@ public:
 		virtual void _get_property_list(List<PropertyInfo> *p_list) const;
 
 		real_t bias = 0.3;
-		real_t damping = 1.;
-		real_t impulse_clamp = 0;
-
-		PinJointData() {}
+		real_t damping = 1.0;
+		real_t impulse_clamp = 0.0;
 	};
 
 	struct ConeJointData : public JointData {
@@ -398,14 +396,11 @@ public:
 		virtual bool _get(const StringName &p_name, Variant &r_ret) const;
 		virtual void _get_property_list(List<PropertyInfo> *p_list) const;
 
-		real_t swing_span;
+		real_t swing_span = Math_PI * 0.25;
 		real_t twist_span = Math_PI;
 		real_t bias = 0.3;
 		real_t softness = 0.8;
 		real_t relaxation = 1.;
-
-		ConeJointData() :
-				swing_span(Math_PI * 0.25) {}
 	};
 
 	struct HingeJointData : public JointData {
@@ -416,16 +411,11 @@ public:
 		virtual void _get_property_list(List<PropertyInfo> *p_list) const;
 
 		bool angular_limit_enabled = false;
-		real_t angular_limit_upper;
-		real_t angular_limit_lower;
+		real_t angular_limit_upper = Math_PI * 0.5;
+		real_t angular_limit_lower = -Math_PI * 0.5;
 		real_t angular_limit_bias = 0.3;
 		real_t angular_limit_softness = 0.9;
 		real_t angular_limit_relaxation = 1.;
-
-		HingeJointData() :
-
-				angular_limit_upper(Math_PI * 0.5),
-				angular_limit_lower(-Math_PI * 0.5) {}
 	};
 
 	struct SliderJointData : public JointData {
@@ -435,45 +425,41 @@ public:
 		virtual bool _get(const StringName &p_name, Variant &r_ret) const;
 		virtual void _get_property_list(List<PropertyInfo> *p_list) const;
 
-		real_t linear_limit_upper = 1.;
-		real_t linear_limit_lower = -1.;
-		real_t linear_limit_softness = 1.;
+		real_t linear_limit_upper = 1.0;
+		real_t linear_limit_lower = -1.0;
+		real_t linear_limit_softness = 1.0;
 		real_t linear_limit_restitution = 0.7;
-		real_t linear_limit_damping = 1.;
-		real_t angular_limit_upper = 0;
-		real_t angular_limit_lower = 0;
-		real_t angular_limit_softness = 1.;
+		real_t linear_limit_damping = 1.0;
+		real_t angular_limit_upper = 0.0;
+		real_t angular_limit_lower = 0.0;
+		real_t angular_limit_softness = 1.0;
 		real_t angular_limit_restitution = 0.7;
-		real_t angular_limit_damping = 1.;
-
-		SliderJointData() {}
+		real_t angular_limit_damping = 1.0;
 	};
 
 	struct SixDOFJointData : public JointData {
 		struct SixDOFAxisData {
 			bool linear_limit_enabled = true;
-			real_t linear_limit_upper = 0;
-			real_t linear_limit_lower = 0;
+			real_t linear_limit_upper = 0.0;
+			real_t linear_limit_lower = 0.0;
 			real_t linear_limit_softness = 0.7;
 			real_t linear_restitution = 0.5;
-			real_t linear_damping = 1.;
+			real_t linear_damping = 1.0;
 			bool linear_spring_enabled = false;
-			real_t linear_spring_stiffness = 0;
-			real_t linear_spring_damping = 0;
-			real_t linear_equilibrium_point = 0;
+			real_t linear_spring_stiffness = 0.0;
+			real_t linear_spring_damping = 0.0;
+			real_t linear_equilibrium_point = 0.0;
 			bool angular_limit_enabled = true;
-			real_t angular_limit_upper = 0;
-			real_t angular_limit_lower = 0;
+			real_t angular_limit_upper = 0.0;
+			real_t angular_limit_lower = 0.0;
 			real_t angular_limit_softness = 0.5;
-			real_t angular_restitution = 0;
-			real_t angular_damping = 1.;
+			real_t angular_restitution = 0.0;
+			real_t angular_damping = 1.0;
 			real_t erp = 0.5;
 			bool angular_spring_enabled = false;
-			real_t angular_spring_stiffness = 0;
-			real_t angular_spring_damping = 0.;
-			real_t angular_equilibrium_point = 0;
-
-			SixDOFAxisData() {}
+			real_t angular_spring_stiffness = 0.0;
+			real_t angular_spring_damping = 0.0;
+			real_t angular_equilibrium_point = 0.0;
 		};
 
 		virtual JointType get_joint_type() { return JOINT_TYPE_6DOF; }
@@ -505,12 +491,12 @@ private:
 	int bone_id = -1;
 
 	String bone_name;
-	real_t bounce = 0;
-	real_t mass = 1;
-	real_t friction = 1;
-	real_t gravity_scale = 1;
-	real_t linear_damp = -1;
-	real_t angular_damp = -1;
+	real_t bounce = 0.0;
+	real_t mass = 1.0;
+	real_t friction = 1.0;
+	real_t gravity_scale = 1.0;
+	real_t linear_damp = -1.0;
+	real_t angular_damp = -1.0;
 	bool can_sleep = true;
 
 protected:
diff --git a/scene/3d/physics_joint_3d.cpp b/scene/3d/physics_joint_3d.cpp
index b8d8af2385..624587cce4 100644
--- a/scene/3d/physics_joint_3d.cpp
+++ b/scene/3d/physics_joint_3d.cpp
@@ -245,8 +245,6 @@ void Joint3D::_bind_methods() {
 }
 
 Joint3D::Joint3D() {
-	exclude_from_collision = true;
-	solver_priority = 1;
 	set_notify_transform(true);
 }
 
diff --git a/scene/3d/physics_joint_3d.h b/scene/3d/physics_joint_3d.h
index e5fd6e6c87..914ac3c392 100644
--- a/scene/3d/physics_joint_3d.h
+++ b/scene/3d/physics_joint_3d.h
@@ -44,8 +44,8 @@ class Joint3D : public Node3D {
 	NodePath a;
 	NodePath b;
 
-	int solver_priority;
-	bool exclude_from_collision;
+	int solver_priority = 1;
+	bool exclude_from_collision = true;
 	String warning;
 
 protected:
diff --git a/scene/3d/ray_cast_3d.cpp b/scene/3d/ray_cast_3d.cpp
index 0b7c15a023..bfe79f15f5 100644
--- a/scene/3d/ray_cast_3d.cpp
+++ b/scene/3d/ray_cast_3d.cpp
@@ -392,13 +392,4 @@ void RayCast3D::_clear_debug_shape() {
 }
 
 RayCast3D::RayCast3D() {
-	enabled = true;
-	collided = false;
-	against_shape = 0;
-	collision_mask = 1;
-	target_position = Vector3(0, -1, 0);
-	debug_shape = nullptr;
-	exclude_parent_body = true;
-	collide_with_areas = false;
-	collide_with_bodies = true;
 }
diff --git a/scene/3d/ray_cast_3d.h b/scene/3d/ray_cast_3d.h
index 4109853280..ae92189527 100644
--- a/scene/3d/ray_cast_3d.h
+++ b/scene/3d/ray_cast_3d.h
@@ -36,28 +36,28 @@
 class RayCast3D : public Node3D {
 	GDCLASS(RayCast3D, Node3D);
 
-	bool enabled;
-	bool collided;
+	bool enabled = true;
+	bool collided = false;
 	ObjectID against;
-	int against_shape;
+	int against_shape = 0;
 	Vector3 collision_point;
 	Vector3 collision_normal;
 
-	Vector3 target_position;
+	Vector3 target_position = Vector3(0, -1, 0);
 	Set<RID> exclude;
 
-	uint32_t collision_mask;
-	bool exclude_parent_body;
+	uint32_t collision_mask = 1;
+	bool exclude_parent_body = true;
 
-	Node *debug_shape;
+	Node *debug_shape = nullptr;
 	Ref<Material> debug_material;
 
 	void _create_debug_shape();
 	void _update_debug_shape();
 	void _clear_debug_shape();
 
-	bool collide_with_areas;
-	bool collide_with_bodies;
+	bool collide_with_areas = false;
+	bool collide_with_bodies = true;
 
 protected:
 	void _notification(int p_what);
diff --git a/scene/3d/reflection_probe.cpp b/scene/3d/reflection_probe.cpp
index 63fa0c06c3..74f7fe2b52 100644
--- a/scene/3d/reflection_probe.cpp
+++ b/scene/3d/reflection_probe.cpp
@@ -257,20 +257,6 @@ void ReflectionProbe::_bind_methods() {
 }
 
 ReflectionProbe::ReflectionProbe() {
-	intensity = 1.0;
-	ambient_mode = AMBIENT_ENVIRONMENT;
-	ambient_color = Color(0, 0, 0);
-	ambient_color_energy = 1.0;
-	max_distance = 0;
-	extents = Vector3(1, 1, 1);
-	origin_offset = Vector3(0, 0, 0);
-	box_projection = false;
-	interior = false;
-	enable_shadows = false;
-	cull_mask = (1 << 20) - 1;
-	update_mode = UPDATE_ONCE;
-	lod_threshold = 1.0;
-
 	probe = RenderingServer::get_singleton()->reflection_probe_create();
 	RS::get_singleton()->instance_set_base(get_instance(), probe);
 	set_disable_scale(true);
diff --git a/scene/3d/reflection_probe.h b/scene/3d/reflection_probe.h
index a43d4e2422..15c2da3ae0 100644
--- a/scene/3d/reflection_probe.h
+++ b/scene/3d/reflection_probe.h
@@ -53,20 +53,20 @@ public:
 
 private:
 	RID probe;
-	float intensity;
-	float max_distance;
-	Vector3 extents;
-	Vector3 origin_offset;
-	bool box_projection;
-	bool enable_shadows;
-	bool interior;
-	AmbientMode ambient_mode;
-	Color ambient_color;
-	float ambient_color_energy;
-	float lod_threshold;
-
-	uint32_t cull_mask;
-	UpdateMode update_mode;
+	float intensity = 1.0;
+	float max_distance = 0.0;
+	Vector3 extents = Vector3(1, 1, 1);
+	Vector3 origin_offset = Vector3(0, 0, 0);
+	bool box_projection = false;
+	bool enable_shadows = false;
+	bool interior = false;
+	AmbientMode ambient_mode = AMBIENT_ENVIRONMENT;
+	Color ambient_color = Color(0, 0, 0);
+	float ambient_color_energy = 1.0;
+	float lod_threshold = 1.0;
+
+	uint32_t cull_mask = (1 << 20) - 1;
+	UpdateMode update_mode = UPDATE_ONCE;
 
 protected:
 	static void _bind_methods();
diff --git a/scene/3d/remote_transform_3d.cpp b/scene/3d/remote_transform_3d.cpp
index 4afbb80779..83ac813c53 100644
--- a/scene/3d/remote_transform_3d.cpp
+++ b/scene/3d/remote_transform_3d.cpp
@@ -217,10 +217,5 @@ void RemoteTransform3D::_bind_methods() {
 }
 
 RemoteTransform3D::RemoteTransform3D() {
-	use_global_coordinates = true;
-	update_remote_position = true;
-	update_remote_rotation = true;
-	update_remote_scale = true;
-
 	set_notify_transform(true);
 }
diff --git a/scene/3d/remote_transform_3d.h b/scene/3d/remote_transform_3d.h
index 3b30c835be..21005d92d1 100644
--- a/scene/3d/remote_transform_3d.h
+++ b/scene/3d/remote_transform_3d.h
@@ -40,10 +40,10 @@ class RemoteTransform3D : public Node3D {
 
 	ObjectID cache;
 
-	bool use_global_coordinates;
-	bool update_remote_position;
-	bool update_remote_rotation;
-	bool update_remote_scale;
+	bool use_global_coordinates = true;
+	bool update_remote_position = true;
+	bool update_remote_rotation = true;
+	bool update_remote_scale = true;
 
 	void _update_remote();
 	void _update_cache();
diff --git a/scene/3d/skeleton_3d.cpp b/scene/3d/skeleton_3d.cpp
index 5e09a15b80..ac2e9bf871 100644
--- a/scene/3d/skeleton_3d.cpp
+++ b/scene/3d/skeleton_3d.cpp
@@ -927,10 +927,6 @@ void Skeleton3D::_bind_methods() {
 }
 
 Skeleton3D::Skeleton3D() {
-	animate_physical_bones = true;
-	dirty = false;
-	version = 1;
-	process_order_dirty = true;
 }
 
 Skeleton3D::~Skeleton3D() {
diff --git a/scene/3d/skeleton_3d.h b/scene/3d/skeleton_3d.h
index 73417dce21..9772bfcc95 100644
--- a/scene/3d/skeleton_3d.h
+++ b/scene/3d/skeleton_3d.h
@@ -74,57 +74,44 @@ private:
 	struct Bone {
 		String name;
 
-		bool enabled;
-		int parent;
-		int sort_index; //used for re-sorting process order
+		bool enabled = true;
+		int parent = -1;
+		int sort_index = 0; //used for re-sorting process order
 
-		bool disable_rest;
+		bool disable_rest = false;
 		Transform rest;
 
 		Transform pose;
 		Transform pose_global;
 
-		bool custom_pose_enable;
+		bool custom_pose_enable = false;
 		Transform custom_pose;
 
-		float global_pose_override_amount;
-		bool global_pose_override_reset;
+		float global_pose_override_amount = 0.0;
+		bool global_pose_override_reset = false;
 		Transform global_pose_override;
 
 #ifndef _3D_DISABLED
-		PhysicalBone3D *physical_bone;
-		PhysicalBone3D *cache_parent_physical_bone;
+		PhysicalBone3D *physical_bone = nullptr;
+		PhysicalBone3D *cache_parent_physical_bone = nullptr;
 #endif // _3D_DISABLED
 
 		List<ObjectID> nodes_bound;
-
-		Bone() {
-			parent = -1;
-			enabled = true;
-			disable_rest = false;
-			custom_pose_enable = false;
-			global_pose_override_amount = 0;
-			global_pose_override_reset = false;
-#ifndef _3D_DISABLED
-			physical_bone = nullptr;
-			cache_parent_physical_bone = nullptr;
-#endif // _3D_DISABLED
-		}
 	};
 
 	Set<SkinReference *> skin_bindings;
 
 	void _skin_changed();
 
-	bool animate_physical_bones;
+	bool animate_physical_bones = true;
 	Vector<Bone> bones;
 	Vector<int> process_order;
-	bool process_order_dirty;
+	bool process_order_dirty = true;
 
 	void _make_dirty();
-	bool dirty;
+	bool dirty = false;
 
-	uint64_t version;
+	uint64_t version = 1;
 
 	// bind helpers
 	Array _get_bound_child_nodes_to_bone(int p_bone) const {
diff --git a/scene/3d/skeleton_ik_3d.h b/scene/3d/skeleton_ik_3d.h
index 557647aa62..eefecf68bb 100644
--- a/scene/3d/skeleton_ik_3d.h
+++ b/scene/3d/skeleton_ik_3d.h
@@ -54,15 +54,13 @@ class FabrikInverseKinematic {
 		BoneId bone = -1;
 		PhysicalBone3D *pb = nullptr;
 
-		real_t length = 0;
+		real_t length = 0.0;
 		/// Positions relative to root bone
 		Transform initial_transform;
 		Vector3 current_pos;
 		// Direction from this bone to child
 		Vector3 current_ori;
 
-		ChainItem() {}
-
 		ChainItem *find_child(const BoneId p_bone_id);
 		ChainItem *add_child(const BoneId p_bone_id);
 	};
@@ -80,7 +78,7 @@ class FabrikInverseKinematic {
 
 	struct Chain {
 		ChainItem chain_root;
-		ChainItem *middle_chain_item;
+		ChainItem *middle_chain_item = nullptr;
 		Vector<ChainTip> tips;
 		Vector3 magnet_position;
 	};
@@ -130,7 +128,7 @@ class SkeletonIK3D : public Node {
 
 	StringName root_bone;
 	StringName tip_bone;
-	real_t interpolation = 1;
+	real_t interpolation = 1.0;
 	Transform target;
 	NodePath target_node_path_override;
 	bool override_tip_basis = true;
diff --git a/scene/3d/soft_body_3d.h b/scene/3d/soft_body_3d.h
index d3c5dc022f..288deb0673 100644
--- a/scene/3d/soft_body_3d.h
+++ b/scene/3d/soft_body_3d.h
@@ -39,13 +39,13 @@ class SoftBodyRenderingServerHandler {
 	friend class SoftBody3D;
 
 	RID mesh;
-	int surface;
+	int surface = 0;
 	Vector<uint8_t> buffer;
-	uint32_t stride;
-	uint32_t offset_vertices;
-	uint32_t offset_normal;
+	uint32_t stride = 0;
+	uint32_t offset_vertices = 0;
+	uint32_t offset_normal = 0;
 
-	uint8_t *write_buffer;
+	uint8_t *write_buffer = nullptr;
 
 private:
 	SoftBodyRenderingServerHandler();
@@ -91,9 +91,9 @@ private:
 	bool pinned_points_cache_dirty = true;
 
 	Ref<ArrayMesh> debug_mesh_cache;
-	class MeshInstance3D *debug_mesh;
+	class MeshInstance3D *debug_mesh = nullptr;
 
-	bool capture_input_on_drag;
+	bool capture_input_on_drag = false;
 	bool ray_pickable = true;
 
 	void _update_pickable();
diff --git a/scene/3d/spring_arm_3d.h b/scene/3d/spring_arm_3d.h
index 864919c631..63505ab9d3 100644
--- a/scene/3d/spring_arm_3d.h
+++ b/scene/3d/spring_arm_3d.h
@@ -38,8 +38,8 @@ class SpringArm3D : public Node3D {
 
 	Ref<Shape3D> shape;
 	Set<RID> excluded_objects;
-	real_t spring_length = 1;
-	real_t current_spring_length = 0;
+	real_t spring_length = 1.0;
+	real_t current_spring_length = 0.0;
 	bool keep_child_basis = false;
 	uint32_t mask = 1;
 	real_t margin = 0.01;
diff --git a/scene/3d/sprite_3d.cpp b/scene/3d/sprite_3d.cpp
index 3e49750366..f178daad42 100644
--- a/scene/3d/sprite_3d.cpp
+++ b/scene/3d/sprite_3d.cpp
@@ -339,24 +339,10 @@ void SpriteBase3D::_bind_methods() {
 }
 
 SpriteBase3D::SpriteBase3D() {
-	color_dirty = true;
-	centered = true;
-	hflip = false;
-	vflip = false;
-	parent_sprite = nullptr;
-	pI = nullptr;
-
 	for (int i = 0; i < FLAG_MAX; i++) {
 		flags[i] = i == FLAG_TRANSPARENT || i == FLAG_DOUBLE_SIDED;
 	}
 
-	alpha_cut = ALPHA_CUT_DISABLED;
-	billboard_mode = StandardMaterial3D::BILLBOARD_DISABLED;
-	axis = Vector3::AXIS_Z;
-	pixel_size = 0.01;
-	modulate = Color(1, 1, 1, 1);
-	pending_update = false;
-	opacity = 1.0;
 	immediate = RenderingServer::get_singleton()->immediate_create();
 	set_base(immediate);
 }
@@ -1109,8 +1095,4 @@ void AnimatedSprite3D::_bind_methods() {
 }
 
 AnimatedSprite3D::AnimatedSprite3D() {
-	frame = 0;
-	playing = false;
-	animation = "default";
-	timeout = 0;
 }
diff --git a/scene/3d/sprite_3d.h b/scene/3d/sprite_3d.h
index 3e38d4581e..a9ce2d8eee 100644
--- a/scene/3d/sprite_3d.h
+++ b/scene/3d/sprite_3d.h
@@ -55,32 +55,32 @@ public:
 	};
 
 private:
-	bool color_dirty;
+	bool color_dirty = true;
 	Color color_accum;
 
-	SpriteBase3D *parent_sprite;
+	SpriteBase3D *parent_sprite = nullptr;
 	List<SpriteBase3D *> children;
-	List<SpriteBase3D *>::Element *pI;
+	List<SpriteBase3D *>::Element *pI = nullptr;
 
-	bool centered;
+	bool centered = true;
 	Point2 offset;
 
-	bool hflip;
-	bool vflip;
+	bool hflip = false;
+	bool vflip = false;
 
-	Color modulate;
-	float opacity;
+	Color modulate = Color(1, 1, 1, 1);
+	float opacity = 1.0;
 
-	Vector3::Axis axis;
-	float pixel_size;
+	Vector3::Axis axis = Vector3::AXIS_Z;
+	float pixel_size = 0.01;
 	AABB aabb;
 
 	RID immediate;
 
 	bool flags[FLAG_MAX];
-	AlphaCutMode alpha_cut;
-	StandardMaterial3D::BillboardMode billboard_mode;
-	bool pending_update;
+	AlphaCutMode alpha_cut = ALPHA_CUT_DISABLED;
+	StandardMaterial3D::BillboardMode billboard_mode = StandardMaterial3D::BILLBOARD_DISABLED;
+	bool pending_update = false;
 	void _im_update();
 
 	void _propagate_color_changed();
@@ -195,16 +195,16 @@ class AnimatedSprite3D : public SpriteBase3D {
 	GDCLASS(AnimatedSprite3D, SpriteBase3D);
 
 	Ref<SpriteFrames> frames;
-	bool playing;
-	StringName animation;
-	int frame;
+	bool playing = false;
+	StringName animation = "default";
+	int frame = 0;
 
-	bool centered;
+	bool centered = true;
 
-	float timeout;
+	float timeout = 0.0;
 
-	bool hflip;
-	bool vflip;
+	bool hflip = 1;
+	bool vflip = 1;
 
 	Color modulate;
 
diff --git a/scene/3d/vehicle_body_3d.cpp b/scene/3d/vehicle_body_3d.cpp
index 0c51c4effd..0d25e2f21f 100644
--- a/scene/3d/vehicle_body_3d.cpp
+++ b/scene/3d/vehicle_body_3d.cpp
@@ -344,31 +344,6 @@ real_t VehicleWheel3D::get_rpm() const {
 }
 
 VehicleWheel3D::VehicleWheel3D() {
-	steers = false;
-	engine_traction = false;
-	m_steering = real_t(0.);
-	m_engineForce = real_t(0.);
-	m_rotation = real_t(0.);
-	m_deltaRotation = real_t(0.);
-	m_brake = real_t(0.);
-	m_rollInfluence = real_t(0.1);
-
-	m_suspensionRestLength = 0.15;
-	m_wheelRadius = 0.5; //0.28;
-	m_suspensionStiffness = 5.88;
-	m_wheelsDampingCompression = 0.83;
-	m_wheelsDampingRelaxation = 0.88;
-	m_frictionSlip = 10.5;
-	m_bIsFrontWheel = false;
-	m_maxSuspensionTravelCm = 500;
-	m_maxSuspensionForce = 6000;
-
-	m_suspensionRelativeVelocity = 0;
-	m_clippedInvContactDotSuspension = 1.0;
-	m_raycastInfo.m_isInContact = false;
-	m_raycastInfo.m_suspensionLength = 0.0;
-
-	body = nullptr;
 }
 
 void VehicleBody3D::_update_wheel_transform(VehicleWheel3D &wheel, PhysicsDirectBodyState3D *s) {
@@ -949,16 +924,6 @@ void VehicleBody3D::_bind_methods() {
 }
 
 VehicleBody3D::VehicleBody3D() {
-	m_pitchControl = 0;
-	m_currentVehicleSpeedKmHour = real_t(0.);
-	m_steeringValue = real_t(0.);
-
-	engine_force = 0;
-	brake = 0;
-
-	state = nullptr;
-	ccd = false;
-
 	exclude.insert(get_rid());
 	//PhysicsServer3D::get_singleton()->body_set_force_integration_callback(get_rid(), this, "_direct_state_changed");
 
diff --git a/scene/3d/vehicle_body_3d.h b/scene/3d/vehicle_body_3d.h
index 790179a8f0..3c35c0ce97 100644
--- a/scene/3d/vehicle_body_3d.h
+++ b/scene/3d/vehicle_body_3d.h
@@ -42,51 +42,51 @@ class VehicleWheel3D : public Node3D {
 
 	Transform m_worldTransform;
 	Transform local_xform;
-	bool engine_traction;
-	bool steers;
+	bool engine_traction = false;
+	bool steers = false;
 
 	Vector3 m_chassisConnectionPointCS; //const
 	Vector3 m_wheelDirectionCS; //const
 	Vector3 m_wheelAxleCS; // const or modified by steering
 
-	real_t m_suspensionRestLength;
-	real_t m_maxSuspensionTravelCm;
-	real_t m_wheelRadius;
+	real_t m_suspensionRestLength = 0.15;
+	real_t m_maxSuspensionTravelCm = 500.0;
+	real_t m_wheelRadius = 0.5;
 
-	real_t m_suspensionStiffness;
-	real_t m_wheelsDampingCompression;
-	real_t m_wheelsDampingRelaxation;
-	real_t m_frictionSlip;
-	real_t m_maxSuspensionForce;
-	bool m_bIsFrontWheel;
+	real_t m_suspensionStiffness = 5.88;
+	real_t m_wheelsDampingCompression = 0.83;
+	real_t m_wheelsDampingRelaxation = 0.88;
+	real_t m_frictionSlip = 10.5;
+	real_t m_maxSuspensionForce = 6000.0;
+	bool m_bIsFrontWheel = false;
 
-	VehicleBody3D *body;
+	VehicleBody3D *body = nullptr;
 
 	//btVector3	m_wheelAxleCS; // const or modified by steering ?
 
-	real_t m_steering;
-	real_t m_rotation;
-	real_t m_deltaRotation;
-	real_t m_rpm;
-	real_t m_rollInfluence;
-	real_t m_engineForce;
-	real_t m_brake;
+	real_t m_steering = 0.0;
+	real_t m_rotation = 0.0;
+	real_t m_deltaRotation = 0.0;
+	real_t m_rpm = 0.0;
+	real_t m_rollInfluence = 0.1;
+	real_t m_engineForce = 0.0;
+	real_t m_brake = 0.0;
 
-	real_t m_clippedInvContactDotSuspension;
-	real_t m_suspensionRelativeVelocity;
+	real_t m_clippedInvContactDotSuspension = 1.0;
+	real_t m_suspensionRelativeVelocity = 0.0;
 	//calculated by suspension
-	real_t m_wheelsSuspensionForce;
-	real_t m_skidInfo;
+	real_t m_wheelsSuspensionForce = 0.0;
+	real_t m_skidInfo = 0.0;
 
 	struct RaycastInfo {
 		//set by raycaster
 		Vector3 m_contactNormalWS; //contactnormal
 		Vector3 m_contactPointWS; //raycast hitpoint
-		real_t m_suspensionLength;
+		real_t m_suspensionLength = 0.0;
 		Vector3 m_hardPointWS; //raycast starting point
 		Vector3 m_wheelDirectionWS; //direction in worldspace
 		Vector3 m_wheelAxleWS; // axle in worldspace
-		bool m_isInContact;
+		bool m_isInContact = false;
 		PhysicsBody3D *m_groundObject; //could be general void* ptr
 	} m_raycastInfo;
 
@@ -153,12 +153,12 @@ public:
 class VehicleBody3D : public RigidBody3D {
 	GDCLASS(VehicleBody3D, RigidBody3D);
 
-	real_t engine_force;
-	real_t brake;
+	real_t engine_force = 0.0;
+	real_t brake = 0.0;
 
-	real_t m_pitchControl;
-	real_t m_steeringValue;
-	real_t m_currentVehicleSpeedKmHour;
+	real_t m_pitchControl = 0.0;
+	real_t m_steeringValue = 0.0;
+	real_t m_currentVehicleSpeedKmHour = 0.0;
 
 	Set<RID> exclude;
 
@@ -168,12 +168,12 @@ class VehicleBody3D : public RigidBody3D {
 	Vector<real_t> m_sideImpulse;
 
 	struct btVehicleWheelContactPoint {
-		PhysicsDirectBodyState3D *m_s;
-		PhysicsBody3D *m_body1;
+		PhysicsDirectBodyState3D *m_s = nullptr;
+		PhysicsBody3D *m_body1 = nullptr;
 		Vector3 m_frictionPositionWorld;
 		Vector3 m_frictionDirectionWorld;
-		real_t m_jacDiagABInv;
-		real_t m_maxImpulse;
+		real_t m_jacDiagABInv = 0.0;
+		real_t m_maxImpulse = 0.0;
 
 		btVehicleWheelContactPoint(PhysicsDirectBodyState3D *s, PhysicsBody3D *body1, const Vector3 &frictionPosWorld, const Vector3 &frictionDirectionWorld, real_t maxImpulse);
 	};
diff --git a/scene/3d/velocity_tracker_3d.cpp b/scene/3d/velocity_tracker_3d.cpp
index 35d00f3639..5b5cc06456 100644
--- a/scene/3d/velocity_tracker_3d.cpp
+++ b/scene/3d/velocity_tracker_3d.cpp
@@ -128,6 +128,4 @@ void VelocityTracker3D::_bind_methods() {
 
 VelocityTracker3D::VelocityTracker3D() {
 	position_history.resize(4); // should be configurable
-	position_history_len = 0;
-	physics_step = false;
 }
diff --git a/scene/3d/velocity_tracker_3d.h b/scene/3d/velocity_tracker_3d.h
index 3fc89cc7fb..e971f4755a 100644
--- a/scene/3d/velocity_tracker_3d.h
+++ b/scene/3d/velocity_tracker_3d.h
@@ -37,13 +37,13 @@ class VelocityTracker3D : public Reference {
 	GDCLASS(VelocityTracker3D, Reference);
 
 	struct PositionHistory {
-		uint64_t frame;
+		uint64_t frame = 0;
 		Vector3 position;
 	};
 
-	bool physics_step;
+	bool physics_step = false;
 	Vector<PositionHistory> position_history;
-	int position_history_len;
+	int position_history_len = 0;
 
 protected:
 	static void _bind_methods();
diff --git a/scene/3d/visibility_notifier_3d.cpp b/scene/3d/visibility_notifier_3d.cpp
index 14c7659de4..68a275684b 100644
--- a/scene/3d/visibility_notifier_3d.cpp
+++ b/scene/3d/visibility_notifier_3d.cpp
@@ -112,7 +112,6 @@ void VisibilityNotifier3D::_bind_methods() {
 }
 
 VisibilityNotifier3D::VisibilityNotifier3D() {
-	aabb = AABB(Vector3(-1, -1, -1), Vector3(2, 2, 2));
 	set_notify_transform(true);
 }
 
@@ -252,6 +251,4 @@ VisibilityEnabler3D::VisibilityEnabler3D() {
 	for (int i = 0; i < ENABLER_MAX; i++) {
 		enabler[i] = true;
 	}
-
-	visible = false;
 }
diff --git a/scene/3d/visibility_notifier_3d.h b/scene/3d/visibility_notifier_3d.h
index d566b7e40b..9f7705067f 100644
--- a/scene/3d/visibility_notifier_3d.h
+++ b/scene/3d/visibility_notifier_3d.h
@@ -41,7 +41,7 @@ class VisibilityNotifier3D : public Node3D {
 	Ref<World3D> world;
 	Set<Camera3D *> cameras;
 
-	AABB aabb;
+	AABB aabb = AABB(Vector3(-1, -1, -1), Vector3(2, 2, 2));
 
 protected:
 	virtual void _screen_enter() {}
@@ -76,7 +76,7 @@ protected:
 	virtual void _screen_enter() override;
 	virtual void _screen_exit() override;
 
-	bool visible;
+	bool visible = false;
 
 	void _find_nodes(Node *p_node);
 
diff --git a/scene/3d/visual_instance_3d.cpp b/scene/3d/visual_instance_3d.cpp
index dd731d13bd..61591cfd10 100644
--- a/scene/3d/visual_instance_3d.cpp
+++ b/scene/3d/visual_instance_3d.cpp
@@ -135,7 +135,6 @@ RID VisualInstance3D::get_base() const {
 VisualInstance3D::VisualInstance3D() {
 	instance = RenderingServer::get_singleton()->instance_create();
 	RenderingServer::get_singleton()->instance_attach_object_instance_id(instance, get_instance_id());
-	layers = 1;
 	set_notify_transform(true);
 }
 
@@ -412,17 +411,5 @@ void GeometryInstance3D::_bind_methods() {
 }
 
 GeometryInstance3D::GeometryInstance3D() {
-	lod_min_distance = 0;
-	lod_max_distance = 0;
-	lod_min_hysteresis = 0;
-	lod_max_hysteresis = 0;
-
-	lod_bias = 1.0;
-
-	gi_mode = GI_MODE_DISABLED;
-	lightmap_scale = LIGHTMAP_SCALE_1X;
-
-	shadow_casting_setting = SHADOW_CASTING_SETTING_ON;
-	extra_cull_margin = 0;
 	//RS::get_singleton()->instance_geometry_set_baked_light_texture_index(get_instance(),0);
 }
diff --git a/scene/3d/visual_instance_3d.h b/scene/3d/visual_instance_3d.h
index f370f29cb0..7fed8095ef 100644
--- a/scene/3d/visual_instance_3d.h
+++ b/scene/3d/visual_instance_3d.h
@@ -42,7 +42,7 @@ class VisualInstance3D : public Node3D {
 
 	RID base;
 	RID instance;
-	uint32_t layers;
+	uint32_t layers = 1;
 
 	RID _get_visual_instance_rid() const;
 
@@ -105,21 +105,21 @@ public:
 	};
 
 private:
-	ShadowCastingSetting shadow_casting_setting;
+	ShadowCastingSetting shadow_casting_setting = SHADOW_CASTING_SETTING_ON;
 	Ref<Material> material_override;
-	float lod_min_distance;
-	float lod_max_distance;
-	float lod_min_hysteresis;
-	float lod_max_hysteresis;
+	float lod_min_distance = 0.0;
+	float lod_max_distance = 0.0;
+	float lod_min_hysteresis = 0.0;
+	float lod_max_hysteresis = 0.0;
 
-	float lod_bias;
+	float lod_bias = 1.0;
 
 	mutable HashMap<StringName, Variant> instance_uniforms;
 	mutable HashMap<StringName, StringName> instance_uniform_property_remap;
 
-	float extra_cull_margin;
-	LightmapScale lightmap_scale;
-	GIMode gi_mode;
+	float extra_cull_margin = 0.0;
+	LightmapScale lightmap_scale = LIGHTMAP_SCALE_1X;
+	GIMode gi_mode = GI_MODE_DISABLED;
 
 	const StringName *_instance_uniform_get_remap(const StringName p_name) const;
 
diff --git a/scene/3d/voxelizer.cpp b/scene/3d/voxelizer.cpp
index b99d753dde..17c8596e8f 100644
--- a/scene/3d/voxelizer.cpp
+++ b/scene/3d/voxelizer.cpp
@@ -1007,7 +1007,4 @@ Transform Voxelizer::get_to_cell_space_xform() const {
 }
 
 Voxelizer::Voxelizer() {
-	sorted = false;
-	color_scan_cell_width = 4;
-	bake_texture_size = 128;
 }
diff --git a/scene/3d/voxelizer.h b/scene/3d/voxelizer.h
index a0b581d625..87f949e7db 100644
--- a/scene/3d/voxelizer.h
+++ b/scene/3d/voxelizer.h
@@ -44,35 +44,25 @@ private:
 
 	struct Cell {
 		uint32_t children[8];
-		float albedo[3]; //albedo in RGB24
-		float emission[3]; //accumulated light in 16:16 fixed point (needs to be integer for moving lights fast)
-		float normal[3];
-		uint32_t used_sides;
-		float alpha; //used for upsampling
-		uint16_t x;
-		uint16_t y;
-		uint16_t z;
-		uint16_t level;
+		float albedo[3] = {}; //albedo in RGB24
+		float emission[3] = {}; //accumulated light in 16:16 fixed point (needs to be integer for moving lights fast)
+		float normal[3] = {};
+		uint32_t used_sides = 0;
+		float alpha = 0.0; //used for upsampling
+		uint16_t x = 0;
+		uint16_t y = 0;
+		uint16_t z = 0;
+		uint16_t level = 0;
 
 		Cell() {
 			for (int i = 0; i < 8; i++) {
 				children[i] = CHILD_EMPTY;
 			}
-
-			for (int i = 0; i < 3; i++) {
-				emission[i] = 0;
-				albedo[i] = 0;
-				normal[i] = 0;
-			}
-			alpha = 0;
-			used_sides = 0;
-			x = y = z = 0;
-			level = 0;
 		}
 	};
 
 	Vector<Cell> bake_cells;
-	int cell_subdiv;
+	int cell_subdiv = 0;
 
 	struct CellSort {
 		union {
@@ -82,10 +72,10 @@ private:
 				uint64_t x : 16;
 				uint64_t level : 16;
 			};
-			uint64_t key;
+			uint64_t key = 0;
 		};
 
-		int32_t index;
+		int32_t index = 0;
 
 		_FORCE_INLINE_ bool operator<(const CellSort &p_cell_sort) const {
 			return key < p_cell_sort.key;
@@ -101,16 +91,16 @@ private:
 	Map<Ref<Material>, MaterialCache> material_cache;
 	AABB original_bounds;
 	AABB po2_bounds;
-	int axis_cell_size[3];
+	int axis_cell_size[3] = {};
 
 	Transform to_cell_space;
 
-	int color_scan_cell_width;
-	int bake_texture_size;
-	float cell_size;
+	int color_scan_cell_width = 4;
+	int bake_texture_size = 128;
+	float cell_size = 0.0;
 
-	int max_original_cells;
-	int leaf_voxel_count;
+	int max_original_cells = 0;
+	int leaf_voxel_count = 0;
 
 	Vector<Color> _get_bake_texture(Ref<Image> p_image, const Color &p_color_mul, const Color &p_color_add);
 	MaterialCache _get_material_cache(Ref<Material> p_material);
@@ -119,7 +109,7 @@ private:
 	void _fixup_plot(int p_idx, int p_level);
 	void _debug_mesh(int p_idx, int p_level, const AABB &p_aabb, Ref<MultiMesh> &p_multimesh, int &idx);
 
-	bool sorted;
+	bool sorted = false;
 	void _sort();
 
 public: