8 files changed, 27 insertions, 9 deletions
diff --git a/scene/3d/gi_probe.cpp b/scene/3d/gi_probe.cpp
index b00a0ec30b..0565193437 100644
--- a/scene/3d/gi_probe.cpp
+++ b/scene/3d/gi_probe.cpp
@@ -520,7 +520,10 @@ String GIProbe::get_configuration_warning() const {
 			warning += "\n\n";
 		}
 		warning += TTR("GIProbes are not supported by the GLES2 video driver.\nUse a BakedLightmap instead.");
+	} else if (probe_data.is_null()) {
+		warning += TTR("No GIProbe data set, so this node is disabled. Bake static objects to enable GI.");
 	}
+
 	return warning;
 }
 
diff --git a/scene/3d/light_3d.cpp b/scene/3d/light_3d.cpp
index acae9965e5..b998a1a400 100644
--- a/scene/3d/light_3d.cpp
+++ b/scene/3d/light_3d.cpp
@@ -212,6 +212,10 @@ void Light3D::_validate_property(PropertyInfo &property) const {
 		property.usage = 0;
 	}
 
+	if (get_light_type() == RS::LIGHT_DIRECTIONAL && property.name == "light_specular") {
+		property.usage = 0;
+	}
+
 	if (get_light_type() == RS::LIGHT_DIRECTIONAL && property.name == "light_projector") {
 		property.usage = 0;
 	}
diff --git a/scene/3d/mesh_instance_3d.cpp b/scene/3d/mesh_instance_3d.cpp
index 865510731e..44dd6e0e5f 100644
--- a/scene/3d/mesh_instance_3d.cpp
+++ b/scene/3d/mesh_instance_3d.cpp
@@ -112,7 +112,6 @@ void MeshInstance3D::set_mesh(const Ref<Mesh> &p_mesh) {
 
 	if (mesh.is_valid()) {
 		mesh->disconnect(CoreStringNames::get_singleton()->changed, callable_mp(this, &MeshInstance3D::_mesh_changed));
-		materials.clear();
 	}
 
 	mesh = p_mesh;
diff --git a/scene/3d/navigation_region_3d.cpp b/scene/3d/navigation_region_3d.cpp
index b7b1415091..e8cfa05a4b 100644
--- a/scene/3d/navigation_region_3d.cpp
+++ b/scene/3d/navigation_region_3d.cpp
@@ -170,18 +170,17 @@ void _bake_navigation_mesh(void *p_user_data) {
 }
 
 void NavigationRegion3D::bake_navigation_mesh() {
-	ERR_FAIL_COND(bake_thread != nullptr);
+	ERR_FAIL_COND(bake_thread.is_started());
 
 	BakeThreadsArgs *args = memnew(BakeThreadsArgs);
 	args->nav_region = this;
 
-	bake_thread = Thread::create(_bake_navigation_mesh, args);
-	ERR_FAIL_COND(bake_thread == nullptr);
+	bake_thread.start(_bake_navigation_mesh, args);
 }
 
 void NavigationRegion3D::_bake_finished(Ref<NavigationMesh> p_nav_mesh) {
 	set_navigation_mesh(p_nav_mesh);
-	bake_thread = nullptr;
+	bake_thread.wait_to_finish();
 	emit_signal("bake_finished");
 }
 
diff --git a/scene/3d/navigation_region_3d.h b/scene/3d/navigation_region_3d.h
index a5b8c2cd5e..e966523b64 100644
--- a/scene/3d/navigation_region_3d.h
+++ b/scene/3d/navigation_region_3d.h
@@ -46,7 +46,7 @@ class NavigationRegion3D : public Node3D {
 
 	Navigation3D *navigation = nullptr;
 	Node *debug_view = nullptr;
-	Thread *bake_thread = nullptr;
+	Thread bake_thread;
 
 protected:
 	void _notification(int p_what);
diff --git a/scene/3d/physics_body_3d.cpp b/scene/3d/physics_body_3d.cpp
index 5645923f22..4d712069ec 100644
--- a/scene/3d/physics_body_3d.cpp
+++ b/scene/3d/physics_body_3d.cpp
@@ -1716,6 +1716,10 @@ bool PhysicalBone3D::SixDOFJointData::_set(const StringName &p_name, const Varia
 
 	String path = p_name;
 
+	if (!path.begins_with("joint_constraints/")) {
+		return false;
+	}
+
 	Vector3::Axis axis;
 	{
 		const String axis_s = path.get_slicec('/', 1);
@@ -1872,6 +1876,10 @@ bool PhysicalBone3D::SixDOFJointData::_get(const StringName &p_name, Variant &r_
 
 	String path = p_name;
 
+	if (!path.begins_with("joint_constraints/")) {
+		return false;
+	}
+
 	int axis;
 	{
 		const String axis_s = path.get_slicec('/', 1);
diff --git a/scene/3d/visibility_notifier_3d.cpp b/scene/3d/visibility_notifier_3d.cpp
index 494709fe84..14c7659de4 100644
--- a/scene/3d/visibility_notifier_3d.cpp
+++ b/scene/3d/visibility_notifier_3d.cpp
@@ -80,13 +80,16 @@ AABB VisibilityNotifier3D::get_aabb() const {
 void VisibilityNotifier3D::_notification(int p_what) {
 	switch (p_what) {
 		case NOTIFICATION_ENTER_WORLD: {
-			get_world_3d()->_register_notifier(this, get_global_transform().xform(aabb));
+			world = get_world_3d();
+			ERR_FAIL_COND(!world.is_valid());
+			world->_register_notifier(this, get_global_transform().xform(aabb));
 		} break;
 		case NOTIFICATION_TRANSFORM_CHANGED: {
-			get_world_3d()->_update_notifier(this, get_global_transform().xform(aabb));
+			world->_update_notifier(this, get_global_transform().xform(aabb));
 		} break;
 		case NOTIFICATION_EXIT_WORLD: {
-			get_world_3d()->_remove_notifier(this);
+			ERR_FAIL_COND(!world.is_valid());
+			world->_remove_notifier(this);
 		} break;
 	}
 }
diff --git a/scene/3d/visibility_notifier_3d.h b/scene/3d/visibility_notifier_3d.h
index 29552510b7..d566b7e40b 100644
--- a/scene/3d/visibility_notifier_3d.h
+++ b/scene/3d/visibility_notifier_3d.h
@@ -33,10 +33,12 @@
 
 #include "scene/3d/node_3d.h"
 
+class World3D;
 class Camera3D;
 class VisibilityNotifier3D : public Node3D {
 	GDCLASS(VisibilityNotifier3D, Node3D);
 
+	Ref<World3D> world;
 	Set<Camera3D *> cameras;
 
 	AABB aabb;