Sky: No more auto-selecting REALTIME mode if radiance is not 256

drivers/gles3/rasterizer_scene_gles3.cpp

@@ -912,7 +912,7 @@ void RasterizerSceneGLES3::_update_sky_radiance(RID p_env, const Projection &p_p
 	RS::SkyMode sky_mode = sky->mode;
 
 	if (sky_mode == RS::SKY_MODE_AUTOMATIC) {
-		if (shader_data->uses_time || shader_data->uses_position) {
+		if ((shader_data->uses_time || shader_data->uses_position) && sky->radiance_size == 256) {
 			update_single_frame = true;
 			sky_mode = RS::SKY_MODE_REALTIME;
 		} else if (shader_data->uses_light || shader_data->ubo_size > 0) {

servers/rendering/renderer_rd/environment/sky.cpp

@@ -1251,7 +1251,7 @@ void SkyRD::update_radiance_buffers(Ref<RenderSceneBuffersRD> p_render_buffers,
 	RS::SkyMode sky_mode = sky->mode;
 
 	if (sky_mode == RS::SKY_MODE_AUTOMATIC) {
-		if (shader_data->uses_time || shader_data->uses_position) {
+		if ((shader_data->uses_time || shader_data->uses_position) && sky->radiance_size == 256) {
 			update_single_frame = true;
 			sky_mode = RS::SKY_MODE_REALTIME;
 		} else if (shader_data->uses_light || shader_data->ubo_size > 0) {