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Grabpass vs HDR performance on Mobile

Discussion in 'Shaders' started by Mehrdad995, May 22, 2020.

  1. Mehrdad995


    Jul 17, 2013
    I'm using an overlay decal to brighten parts of the ground,
    as LDR clamps values in a [0-1] range I can't do such thing with shader blending (DstColor/Zero)
    So the only two workarounds I found were to either enable HDR or use a Grabpass in my shader to overcome this limit.
    I'm already using post-processing, with that keeping in mind, is using R11G11B10 HDR heavier or using a Grab-Pass (post-processing is already using grab-pass, can I re-use the grabbed data)???
    none of the above had a noticeable impact on the devices I tested but I'm concerned as some devices may have issues!
    Can someone please briefly describes with one is better?
    Thanks a lot.