diff --git a/servers/rendering/renderer_rd/environment/fog.cpp b/servers/rendering/renderer_rd/environment/fog.cpp
index 78b785153fa..e6c827ce207 100644
--- a/servers/rendering/renderer_rd/environment/fog.cpp
+++ b/servers/rendering/renderer_rd/environment/fog.cpp
@@ -312,11 +312,21 @@ ALBEDO = vec3(1.0);
 void Fog::free_fog_shader() {
 	MaterialStorage *material_storage = MaterialStorage::get_singleton();
 
-	volumetric_fog.process_shader.version_free(volumetric_fog.process_shader_version);
-	RD::get_singleton()->free(volumetric_fog.volume_ubo);
-	RD::get_singleton()->free(volumetric_fog.params_ubo);
-	material_storage->shader_free(volumetric_fog.default_shader);
-	material_storage->material_free(volumetric_fog.default_material);
+	if (volumetric_fog.process_shader_version.is_valid()) {
+		volumetric_fog.process_shader.version_free(volumetric_fog.process_shader_version);
+	}
+	if (volumetric_fog.volume_ubo.is_valid()) {
+		RD::get_singleton()->free(volumetric_fog.volume_ubo);
+	}
+	if (volumetric_fog.params_ubo.is_valid()) {
+		RD::get_singleton()->free(volumetric_fog.params_ubo);
+	}
+	if (volumetric_fog.default_shader.is_valid()) {
+		material_storage->shader_free(volumetric_fog.default_shader);
+	}
+	if (volumetric_fog.default_material.is_valid()) {
+		material_storage->material_free(volumetric_fog.default_material);
+	}
 }
 
 void Fog::FogShaderData::set_code(const String &p_code) {
diff --git a/servers/rendering/renderer_rd/environment/gi.cpp b/servers/rendering/renderer_rd/environment/gi.cpp
index c2a018c7c6c..964d4d9adf0 100644
--- a/servers/rendering/renderer_rd/environment/gi.cpp
+++ b/servers/rendering/renderer_rd/environment/gi.cpp
@@ -3581,18 +3581,40 @@ void GI::init(SkyRD *p_sky) {
 }
 
 void GI::free() {
-	RD::get_singleton()->free(default_voxel_gi_buffer);
-	RD::get_singleton()->free(voxel_gi_lights_uniform);
-	RD::get_singleton()->free(sdfgi_ubo);
+	if (default_voxel_gi_buffer.is_valid()) {
+		RD::get_singleton()->free(default_voxel_gi_buffer);
+	}
+	if (voxel_gi_lights_uniform.is_valid()) {
+		RD::get_singleton()->free(voxel_gi_lights_uniform);
+	}
+	if (sdfgi_ubo.is_valid()) {
+		RD::get_singleton()->free(sdfgi_ubo);
+	}
 
-	voxel_gi_debug_shader.version_free(voxel_gi_debug_shader_version);
-	voxel_gi_shader.version_free(voxel_gi_lighting_shader_version);
-	shader.version_free(shader_version);
-	sdfgi_shader.debug_probes.version_free(sdfgi_shader.debug_probes_shader);
-	sdfgi_shader.debug.version_free(sdfgi_shader.debug_shader);
-	sdfgi_shader.direct_light.version_free(sdfgi_shader.direct_light_shader);
-	sdfgi_shader.integrate.version_free(sdfgi_shader.integrate_shader);
-	sdfgi_shader.preprocess.version_free(sdfgi_shader.preprocess_shader);
+	if (voxel_gi_debug_shader_version.is_valid()) {
+		voxel_gi_debug_shader.version_free(voxel_gi_debug_shader_version);
+	}
+	if (voxel_gi_lighting_shader_version.is_valid()) {
+		voxel_gi_shader.version_free(voxel_gi_lighting_shader_version);
+	}
+	if (shader_version.is_valid()) {
+		shader.version_free(shader_version);
+	}
+	if (sdfgi_shader.debug_probes_shader.is_valid()) {
+		sdfgi_shader.debug_probes.version_free(sdfgi_shader.debug_probes_shader);
+	}
+	if (sdfgi_shader.debug_shader.is_valid()) {
+		sdfgi_shader.debug.version_free(sdfgi_shader.debug_shader);
+	}
+	if (sdfgi_shader.direct_light_shader.is_valid()) {
+		sdfgi_shader.direct_light.version_free(sdfgi_shader.direct_light_shader);
+	}
+	if (sdfgi_shader.integrate_shader.is_valid()) {
+		sdfgi_shader.integrate.version_free(sdfgi_shader.integrate_shader);
+	}
+	if (sdfgi_shader.preprocess_shader.is_valid()) {
+		sdfgi_shader.preprocess.version_free(sdfgi_shader.preprocess_shader);
+	}
 
 	if (voxel_gi_lights) {
 		memdelete_arr(voxel_gi_lights);