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Alpha in sRGB texture

dzibarik
polycounter lvl 10
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dzibarik polycounter lvl 10
I was wondering - if I want to put AO or roughness in alpha of a base color texure will alpha be sRGB or not? I have heard that Unreal remaps alpha as linear automatically. Is it true?
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  • musashidan
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    musashidan high dynamic range
    Yes, you can. In fact, this is the recommended setup by Epic for mobile games to only need 2 textures for an asset:
    1 - Base colour in RGB channel - Roughness in Alpha channel(metalness is a scalar node)
    2 - Normal map

    Alpha channel is recognised as linear data and auto-interpolated so you would leave sRGB enabled.
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