material->FogEnable = scm_to_bool (fog_enable);
material->NormalizeNormals = scm_to_bool (normalize_normals);
material->UseMipMaps = scm_to_bool (use_mip_maps);
material->FogEnable = scm_to_bool (fog_enable);
material->NormalizeNormals = scm_to_bool (normalize_normals);
material->UseMipMaps = scm_to_bool (use_mip_maps);