make terrain from usd

[GlackZ]

    self.terrain = TerrainImporterCfg(
        prim_path="/World/ground",
        terrain_type=config.terrain_type,
        terrain_generator=config.terrain_generator,
        max_init_terrain_level=config.max_init_terrain_level,
        collision_group=-1,
        physics_material=sim_utils.RigidBodyMaterialCfg(
            friction_combine_mode="multiply",
            restitution_combine_mode="multiply",
            static_friction=1.0,
            dynamic_friction=1.0,
        ),
        visual_material=sim_utils.MdlFileCfg(
            mdl_path=f"{ISAACLAB_NUCLEUS_DIR}/Materials/TilesMarbleSpiderWhiteBrickBondHoned/TilesMarbleSpiderWhiteBrickBondHoned.mdl",
            project_uvw=True,
            texture_scale=(0.25, 0.25),
        ),
        debug_vis=False,
    )

好像没有给从USD创建地形留有接口