Single channel (R) texture format, 16 bit integer.
Currently, this texture format is only useful for runtime or native code plugins as there is no support for texture importing for this format.
注意，并非所有显卡都支持所有纹理格式。请使用 SystemInfo.SupportsTextureFormat 进行检查。
另请参阅：Texture2D.format、texture assets。