pub fn load_obj_with_mtl(obj_file: File, mtl_file: File) -> Result<Vec<Object>>
Load an object, with materials, from a Wavefront .OBJ file
This function ignores the mtllib commands that look for files in the same directory,
instead choosing a more explicit approach where you pass in the .mtl file directly
as the second argument.
See here and
here for details.