In total, to have mipmapping + bump mapping + 10 or more layers + morphing + UVs at all altitudes, the shader only needs 12 texture samples.

• 总之，要在所有的海拔视角下都能完成MIP贴图+凹凸贴图+10层或更多的样式+多边形变换+UV贴图，着色器只需要做12次材质采样。