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Android -- Second UV Set on Animated Character

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    Android -- Second UV Set on Animated Character

    We have a football player with 2 UV sets. Set 0 is used for the shirt material, whereas the second is used to overlay a number on his jersey. This lets us save a lot on texture memory, since we don't need a separate shirt texture for each player.


    On desktop systems this works fine. When we publish to Android it acts as if the second UV set doesn't exist. There are not any errors during shader compilation or while running, but the number simply does not show up. If I force the number texture sampler to use UV set 0, the number does show up, but of course is not positioned correctly. This tells me it is not the rest of the shader, but must be due to the second UV set not coming through correctly.

    Do any of you know if multiple UV sets are supported for skinned characters on Android?

    #2
    We found this also happens on iOS. I am almost convinced that Unreal 4 does not send a second UV set to the GPU on mobile devices.

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      #3
      AFAIK it *should* work... I'll add an internal ticket to investigate. Can you try to see if it works on mobile preview?

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        #4
        It does not work on Mobile preview either

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