use render config from face description

lib/rbx_loader/src/union.rs

@@ -116,7 +116,7 @@ pub fn convert(
 		}
 		(0..NORMAL_FACES).map(|polygon_group_id|{
 			model::IndexedGraphicsGroup{
-				render:RenderConfigId::new(0),
+				render:cube_face_description[polygon_group_id].as_ref().map_or(RenderConfigId::new(0),|face_description|face_description.render),
 				groups:vec![PolygonGroupId::new(polygon_group_id as u32)]
 			}
 		}).collect()