add_property("roughness", &PbrMaterial::set_roughness, &PbrMaterial::set_roughness_map);
add_property("occlusion", &PbrMaterial::set_occlusion_map);
add_property("emission", &PbrMaterial::set_emission, &PbrMaterial::set_emission_map, false);
add_property("roughness", &PbrMaterial::set_roughness, &PbrMaterial::set_roughness_map);
add_property("occlusion", &PbrMaterial::set_occlusion_map);
add_property("emission", &PbrMaterial::set_emission, &PbrMaterial::set_emission_map, false);