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Does PVR image format support indexed image?
What’s the different between ‘i’ and ‘l’ channel names in PVRTexTool Command-Line tool?
indexed images, also know as palette images are not supported by PVR Image formats.
The ‘i’ channel stands for intensity which is calculated as i=(R+G+B)/3. The ‘l’ channel stands for luminosity which is calculated as L=0.2126 R + 0.7152 G + 0.0722 B.