Reset SDFGI when changing editor scene tabs

drivers/gles3/environment/gi.cpp

@@ -137,4 +137,7 @@ uint32_t GI::voxel_gi_get_version(RID p_voxel_gi) const {
 	return 0;
 }
 
+void GI::sdfgi_reset() {
+}
+
 #endif // GLES3_ENABLED

drivers/gles3/environment/gi.h

@@ -90,6 +90,8 @@ public:
 	virtual bool voxel_gi_is_using_two_bounces(RID p_voxel_gi) const override;
 
 	virtual uint32_t voxel_gi_get_version(RID p_voxel_gi) const override;
+
+	virtual void sdfgi_reset() override;
 };
 
 }; // namespace GLES3

editor/editor_node.cpp

@@ -65,6 +65,7 @@
 #include "servers/display_server.h"
 #include "servers/navigation_server_3d.h"
 #include "servers/physics_server_2d.h"
+#include "servers/rendering_server.h"
 
 #include "editor/audio_stream_preview.h"
 #include "editor/debugger/editor_debugger_node.h"
@@ -3463,6 +3464,9 @@ void EditorNode::_set_main_scene_state(Dictionary p_state, Node *p_for_scene) {
 	ScriptEditor::get_singleton()->set_scene_root_script(editor_data.get_scene_root_script(editor_data.get_edited_scene()));
 	editor_data.notify_edited_scene_changed();
 	emit_signal(SNAME("scene_changed"));
+
+	// Reset SDFGI after everything else so that any last-second scene modifications will be processed.
+	RenderingServer::get_singleton()->sdfgi_reset();
 }
 
 bool EditorNode::is_changing_scene() const {

servers/rendering/dummy/environment/gi.h

@@ -78,6 +78,8 @@ public:
 	virtual bool voxel_gi_is_using_two_bounces(RID p_voxel_gi) const override { return false; }
 
 	virtual uint32_t voxel_gi_get_version(RID p_voxel_gi) const override { return 0; }
+
+	virtual void sdfgi_reset() override {}
 };
 
 } // namespace RendererDummy

servers/rendering/environment/renderer_gi.h

@@ -79,6 +79,8 @@ public:
 	virtual bool voxel_gi_is_using_two_bounces(RID p_voxel_gi) const = 0;
 
 	virtual uint32_t voxel_gi_get_version(RID p_probe) const = 0;
+
+	virtual void sdfgi_reset() = 0;
 };
 
 #endif // RENDERER_GI_H

servers/rendering/renderer_rd/environment/gi.cpp

@@ -392,6 +392,10 @@ Dependency *GI::voxel_gi_get_dependency(RID p_voxel_gi) const {
 	return &voxel_gi->dependency;
 }
 
+void GI::sdfgi_reset() {
+	sdfgi_current_version++;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // SDFGI
 
@@ -416,6 +420,7 @@ void GI::SDFGI::create(RID p_env, const Vector3 &p_world_position, uint32_t p_re
 	y_scale_mode = RendererSceneRenderRD::get_singleton()->environment_get_sdfgi_y_scale(p_env);
 	static const float y_scale[3] = { 2.0, 1.5, 1.0 };
 	y_mult = y_scale[y_scale_mode];
+	version = gi->sdfgi_current_version;
 	cascades.resize(num_cascades);
 	probe_axis_count = SDFGI::PROBE_DIVISOR + 1;
 	solid_cell_ratio = gi->sdfgi_solid_cell_ratio;

servers/rendering/renderer_rd/environment/gi.h

@@ -667,6 +667,7 @@ public:
 
 		float y_mult = 1.0;
 
+		uint32_t version = 0;
 		uint32_t render_pass = 0;
 
 		int32_t cascade_dynamic_light_count[SDFGI::MAX_CASCADES]; //used dynamically
@@ -701,11 +702,14 @@ public:
 	Vector3 sdfgi_debug_probe_dir;
 	bool sdfgi_debug_probe_enabled = false;
 	Vector3i sdfgi_debug_probe_index;
+	uint32_t sdfgi_current_version = 0;
 
 	/* SDFGI UPDATE */
 
 	int sdfgi_get_lightprobe_octahedron_size() const { return SDFGI::LIGHTPROBE_OCT_SIZE; }
 
+	virtual void sdfgi_reset() override;
+
 	struct SDFGIData {
 		float grid_size[3];
 		uint32_t max_cascades;

servers/rendering/renderer_rd/forward_clustered/render_forward_clustered.cpp

@@ -3323,14 +3323,18 @@ void RenderForwardClustered::sdfgi_update(const Ref<RenderSceneBuffers> &p_rende
 	}
 
 	bool needs_sdfgi = p_environment.is_valid() && environment_get_sdfgi_enabled(p_environment);
+	bool needs_reset = sdfgi.is_valid() ? sdfgi->version != gi.sdfgi_current_version : false;
 
-	if (!needs_sdfgi) {
+	if (!needs_sdfgi || needs_reset) {
 		if (sdfgi.is_valid()) {
 			// delete it
 			sdfgi.unref();
 			rb->set_custom_data(RB_SCOPE_SDFGI, sdfgi);
 		}
-		return;
+
+		if (!needs_sdfgi) {
+			return;
+		}
 	}
 
 	// Ensure advanced shaders are available if SDFGI is used.

servers/rendering/rendering_server_default.h

@@ -476,6 +476,8 @@ public:
 	FUNC2(voxel_gi_set_interior, RID, bool)
 	FUNC2(voxel_gi_set_use_two_bounces, RID, bool)
 
+	FUNC0(sdfgi_reset)
+
 	/* PARTICLES */
 
 #undef ServerName

servers/rendering_server.h

@@ -617,6 +617,8 @@ public:
 
 	virtual void voxel_gi_set_quality(VoxelGIQuality) = 0;
 
+	virtual void sdfgi_reset() = 0;
+
 	/* LIGHTMAP */
 
 	virtual RID lightmap_create() = 0;