Merge pull request #70133 from lyuma/negative_scale_backface

Flip culling when rendering a camera with negative scale

drivers/gles3/rasterizer_scene_gles3.cpp

@@ -1739,7 +1739,7 @@ void RasterizerSceneGLES3::render_scene(const Ref<RenderSceneBuffers> &p_render_
 		render_data.reflection_probes = &empty;
 	}
 
-	bool reverse_cull = false;
+	bool reverse_cull = render_data.cam_transform.basis.determinant() < 0;
 
 	///////////
 	// Fill Light lists here

servers/rendering/renderer_rd/forward_clustered/render_forward_clustered.cpp

@@ -1622,7 +1622,7 @@ void RenderForwardClustered::_render_scene(RenderDataRD *p_render_data, const Co
 	bool using_ssr = false;
 	bool using_sdfgi = false;
 	bool using_voxelgi = false;
-	bool reverse_cull = false;
+	bool reverse_cull = p_render_data->scene_data->cam_transform.basis.determinant() < 0;
 	bool using_ssil = p_render_data->environment.is_valid() && environment_get_ssil_enabled(p_render_data->environment);
 
 	if (rb.is_valid()) {

servers/rendering/renderer_rd/forward_mobile/render_forward_mobile.cpp

@@ -673,7 +673,7 @@ void RenderForwardMobile::_render_scene(RenderDataRD *p_render_data, const Color
 
 	Size2i screen_size;
 	RID framebuffer;
-	bool reverse_cull = false;
+	bool reverse_cull = p_render_data->scene_data->cam_transform.basis.determinant() < 0;
 	bool using_subpass_transparent = true;
 	bool using_subpass_post_process = true;