TextureImporter 中 HDR 纹理的 RGBM 编码模式。
HDR 纹理数据(即来自 .exr 或 .hdr 文件)可以由 Unity 编码为 RGBM 格式。此设置控制编码的完成方式。默认设置为“Auto”,这意味着在源数据为 HDR 时执行 RGBM 编码。
RGBM 编码将 [0;8] 范围打包到 [0;1] 中,并将乘数存储在 Alpha 通道中。最终值为 RGB*A*8。
另请参阅:TextureImporterSettings.rgbm。
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