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Resolved DrawRenderers Has Broken Sorting on Transparent

Discussion in 'High Definition Render Pipeline' started by TheWanderingBen, Jan 25, 2023.

  1. TheWanderingBen


    Nov 3, 2015
    I want to render any transparent objects into the Custom Color Buffer using a DrawRenderers Custom Pass, but even using the default Custom Pass, I get sorting issues.

    The default DrawRenderers Custom Pass:

    The Custom Color Buffer output when looking at my smoke VFX:

    This seems like a bug to me, but maybe I'm doing something wrong here? Would love any help!

    Unity 2022.2.1f1
    HDRP 14.0.4
    Forward Rendering
  2. Remy_Unity


    Unity Technologies

    Oct 3, 2017
    You are not clearing the color nor the depth buffer (Clear Flags), so it is expected to see "ghost" rendering in your buffer.
  3. TheWanderingBen


    Nov 3, 2015
    Hey Remy, thanks for the response. Unfortunately that wasn't the issue. I tried clearing the all the buffers, but nothing changed.

    However, I did solve it! I needed the Custom Pass to both write depth and to write color -- unfortunately, that meant that it did a ZTest when writing color, which I didn't want it to do on the smoke particles.

    Instead, I changed to use two custom passes -- the first writes color, the second writes depth, and now it all seems sorted!
    Last edited: Jan 26, 2023