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Flickering shadows in HDRP

Discussion in 'High Definition Render Pipeline' started by cpkcpk, May 4, 2020.

  1. cpkcpk

    cpkcpk

    Joined:
    Dec 13, 2019
    Posts:
    48
    Hi,

    In all of my HDRP projects, shadows are seriously flickering in game view, but look fine in scene view.

    Here's a video comparing game view and scene view -


    TAA anti aliasing on the camera helps with the flicking shadows, but looks pretty bad overall and makes my water flicker badly instead -


    Changing direction light shadow resolution from 1024 to 2048 or 4096 also helps. but still flickers and hits the performance a lot.

    I've tried all the anti aliasing modes, playing with the shadow cascades and distance, turning off post processing, enabling high quality volumetrics, LOD Bias, camera clipping etc but still haven't found a solution!

    I'm on 2019.3 HDRP 7.3.1 on a Macbook Pro 16" with the AMD 5500M.

    Thanks
     
    cpkcpk, May 4, 2020
    #1

  2. antoniopepe

    antoniopepe

    Joined:
    May 12, 2020
    Posts:
    2
    I have same quality issue ... anyone can solve ?
     
    antoniopepe, May 13, 2020
    #2

  3. Gaoyu2020

    Gaoyu2020

    Joined:
    Aug 25, 2014
    Posts:
    19
    I have same quality issue ... anyone can solve ?
     
    Gaoyu2020, Oct 13, 2020
    #3

  4. olavrv

    olavrv

    Joined:
    May 26, 2015
    Posts:
    515
    Try enabling mipmap on normal map texture, should fix it
     
    olavrv, Oct 15, 2020
    #4

  5. Gaoyu2020

    Gaoyu2020

    Joined:
    Aug 25, 2014
    Posts:
    19
    I didn't use any textures.
     
    Gaoyu2020, Oct 19, 2020
    #5

  6. pierred_unity

    pierred_unity

    Unity Technologies

    Joined:
    May 25, 2018
    Posts:
    433
    Hey, there were many improvements to the temporal anti-aliasing in HDRP 9/10 (Unity 2020), and anti-flickering control is one of them:
    https://docs.unity3d.com/Packages/c...s.high-definition@9.0/manual/HDRP-Camera.html

    It should be helping quite radically on the water scene. And it will improve shadowing stability too. You might want to reduce the split 1 distance potentially, as well as the overall distance (900m is a lot), and use contact shadows as a fallback in the distance. With HDRP 9/10, you can even set a min shadow distance for the contact shadows, so that they only appear beyond a certain distance.
     
    pierred_unity, Oct 20, 2020
    #6
    olavrv likes this.