add deprecation warning message

Author: YilingQiao

genesis/engine/mesh.py

@@ -343,6 +343,13 @@ def from_morph_surface(cls, morph, surface=None):
             if morph.is_format(gs.options.morphs.MESH_FORMATS):
                 meshes = mu.parse_mesh_trimesh(morph.file, morph.group_by_material, morph.scale, surface)
             elif morph.is_format(gs.options.morphs.GLTF_FORMATS):
+
+                if not morph.parse_glb_with_trimesh:
+                    gs.logger.warning(
+                        "GLTF is using y-up while Genesis uses z-up. Please set parse_glb_with_zup=True"
+                        " in morph options if you find the mesh is 90-degree rotated. We will set parse_glb_with_zup=True"
+                        " and rotate glb mesh by default later and gradually enforce this option."
+                    )
                 if morph.parse_glb_with_trimesh:
                     meshes = mu.parse_mesh_trimesh(morph.file, morph.group_by_material, morph.scale, surface)
                     if morph.parse_glb_with_zup: