           materials: [],
                object: {
                    uuid: "00c2baef-9600-4c6b-b88d-7e82c40e004f",
                    type: "_meshfile_object",
                    format: "obj",
                    data: obj_contents,
                    mtl_library: mtl_contents,
                    resources: {"cube.png": texture_uri}
                }
            }
        });
        </script>


         <style>
            body {
                margin: 0;
            }

            #meshcat-pane {