3 files changed, 28 insertions, 4 deletions
diff --git a/scene/main/scene_tree.cpp b/scene/main/scene_tree.cpp
index a62c4ff770..387af3703b 100644
--- a/scene/main/scene_tree.cpp
+++ b/scene/main/scene_tree.cpp
@@ -1378,6 +1378,9 @@ SceneTree::SceneTree() {
 	const bool use_debanding = GLOBAL_DEF("rendering/anti_aliasing/quality/use_debanding", false);
 	root->set_use_debanding(use_debanding);
 
+	const bool use_occlusion_culling = GLOBAL_DEF("rendering/occlusion_culling/use_occlusion_culling", false);
+	root->set_use_occlusion_culling(use_occlusion_culling);
+
 	float lod_threshold = GLOBAL_DEF("rendering/mesh_lod/lod_change/threshold_pixels", 1.0);
 	ProjectSettings::get_singleton()->set_custom_property_info("rendering/mesh_lod/lod_change/threshold_pixels", PropertyInfo(Variant::FLOAT, "rendering/mesh_lod/lod_change/threshold_pixels", PROPERTY_HINT_RANGE, "0,1024,0.1"));
 	root->set_lod_threshold(lod_threshold);
diff --git a/scene/main/viewport.cpp b/scene/main/viewport.cpp
index 4c9ebe016e..f1613f2fe5 100644
--- a/scene/main/viewport.cpp
+++ b/scene/main/viewport.cpp
@@ -3242,6 +3242,21 @@ float Viewport::get_lod_threshold() const {
 	return lod_threshold;
 }
 
+void Viewport::set_use_occlusion_culling(bool p_use_occlusion_culling) {
+	if (use_occlusion_culling == p_use_occlusion_culling) {
+		return;
+	}
+
+	use_occlusion_culling = p_use_occlusion_culling;
+	RS::get_singleton()->viewport_set_use_occlusion_culling(viewport, p_use_occlusion_culling);
+
+	notify_property_list_changed();
+}
+
+bool Viewport::is_using_occlusion_culling() const {
+	return use_occlusion_culling;
+}
+
 void Viewport::set_debug_draw(DebugDraw p_debug_draw) {
 	debug_draw = p_debug_draw;
 	RS::get_singleton()->viewport_set_debug_draw(viewport, RS::ViewportDebugDraw(p_debug_draw));
@@ -3331,9 +3346,6 @@ bool Viewport::is_handling_input_locally() const {
 	return handle_input_locally;
 }
 
-void Viewport::_validate_property(PropertyInfo &property) const {
-}
-
 void Viewport::set_default_canvas_item_texture_filter(DefaultCanvasItemTextureFilter p_filter) {
 	ERR_FAIL_INDEX(p_filter, DEFAULT_CANVAS_ITEM_TEXTURE_FILTER_MAX);
 
@@ -3478,6 +3490,9 @@ void Viewport::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_use_debanding", "enable"), &Viewport::set_use_debanding);
 	ClassDB::bind_method(D_METHOD("is_using_debanding"), &Viewport::is_using_debanding);
 
+	ClassDB::bind_method(D_METHOD("set_use_occlusion_culling", "enable"), &Viewport::set_use_occlusion_culling);
+	ClassDB::bind_method(D_METHOD("is_using_occlusion_culling"), &Viewport::is_using_occlusion_culling);
+
 	ClassDB::bind_method(D_METHOD("set_debug_draw", "debug_draw"), &Viewport::set_debug_draw);
 	ClassDB::bind_method(D_METHOD("get_debug_draw"), &Viewport::get_debug_draw);
 
@@ -3574,6 +3589,7 @@ void Viewport::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "msaa", PROPERTY_HINT_ENUM, "Disabled,2x,4x,8x,16x,AndroidVR 2x,AndroidVR 4x"), "set_msaa", "get_msaa");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "screen_space_aa", PROPERTY_HINT_ENUM, "Disabled,FXAA"), "set_screen_space_aa", "get_screen_space_aa");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "use_debanding"), "set_use_debanding", "is_using_debanding");
+	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "use_occlusion_culling"), "set_use_occlusion_culling", "is_using_occlusion_culling");
 	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "lod_threshold", PROPERTY_HINT_RANGE, "0,1024,0.1"), "set_lod_threshold", "get_lod_threshold");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "debug_draw", PROPERTY_HINT_ENUM, "Disabled,Unshaded,Overdraw,Wireframe"), "set_debug_draw", "get_debug_draw");
 	ADD_GROUP("Canvas Items", "canvas_item_");
@@ -3655,6 +3671,7 @@ void Viewport::_bind_methods() {
 	BIND_ENUM_CONSTANT(DEBUG_DRAW_CLUSTER_SPOT_LIGHTS);
 	BIND_ENUM_CONSTANT(DEBUG_DRAW_CLUSTER_DECALS);
 	BIND_ENUM_CONSTANT(DEBUG_DRAW_CLUSTER_REFLECTION_PROBES);
+	BIND_ENUM_CONSTANT(DEBUG_DRAW_OCCLUDERS)
 
 	BIND_ENUM_CONSTANT(DEFAULT_CANVAS_ITEM_TEXTURE_FILTER_NEAREST);
 	BIND_ENUM_CONSTANT(DEFAULT_CANVAS_ITEM_TEXTURE_FILTER_LINEAR);
diff --git a/scene/main/viewport.h b/scene/main/viewport.h
index e8a88debf1..6786b70a6b 100644
--- a/scene/main/viewport.h
+++ b/scene/main/viewport.h
@@ -147,6 +147,7 @@ public:
 		DEBUG_DRAW_CLUSTER_SPOT_LIGHTS,
 		DEBUG_DRAW_CLUSTER_DECALS,
 		DEBUG_DRAW_CLUSTER_REFLECTION_PROBES,
+		DEBUG_DRAW_OCCLUDERS,
 	};
 
 	enum DefaultCanvasItemTextureFilter {
@@ -304,6 +305,7 @@ private:
 	ScreenSpaceAA screen_space_aa = SCREEN_SPACE_AA_DISABLED;
 	bool use_debanding = false;
 	float lod_threshold = 1.0;
+	bool use_occlusion_culling = false;
 
 	Ref<ViewportTexture> default_texture;
 	Set<ViewportTexture *> viewport_textures;
@@ -480,7 +482,6 @@ protected:
 	void _notification(int p_what);
 	void _process_picking();
 	static void _bind_methods();
-	virtual void _validate_property(PropertyInfo &property) const override;
 
 public:
 	uint64_t get_processed_events_count() const { return event_count; }
@@ -556,6 +557,9 @@ public:
 	void set_lod_threshold(float p_pixels);
 	float get_lod_threshold() const;
 
+	void set_use_occlusion_culling(bool p_us_occlusion_culling);
+	bool is_using_occlusion_culling() const;
+
 	Vector2 get_camera_coords(const Vector2 &p_viewport_coords) const;
 	Vector2 get_camera_rect_size() const;