struct GeometryMeshMeta {
mesh_key_high: u32,
mesh_key_low: u32,
morph_geometry_target_len: u32,
morph_geometry_weights_offset: u32,
morph_geometry_values_offset: u32,
skin_sets_len: u32,
skin_matrices_offset: u32,
skin_index_weights_offset: u32,
transform_offset: u32,
// this is not the offset of the material
// it's the offset of the mesh_meta data in the material *pass*
material_mesh_meta_offset: u32
}