根据面的法线为面分配材质。设计时考虑到了环境，面根据向上方向分为几组。组别为：[顶部、底部、侧面、顶部坡度、底部坡度]
Assign materials to faces based on their normal. Designed with environments in mind, faces are sorted into groups based on an up direction.The groups are:[Top, Bottom, Sides, Top Slopes, Bottom Slopes]
测试安装环境(其他版本自行测试) Blender 4.1、4.0
