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Question Can URP Terrain/Lit shaders be SRP-Batched?

Discussion in 'Universal Render Pipeline' started by Fressbrett, Nov 17, 2022.

  1. Fressbrett

    Fressbrett

    Joined:
    Apr 11, 2018
    Posts:
    83
    Hello,

    I just enabled SRP batching following the guides within the URP documentation and it does work as expected. However, I noticed over 1k draw calls just for my Terrain, which uses the default UniversalRenderPipeline/Terrain/Lit shader. According to the Frame Debugger the Terrain doesn't get batched through SRP Batching.

    The shader also states it's not compatible with SRP batching:
    upload_2022-11-17_12-55-42.png

    Is there a way to create a terrain shader that is compatable, or is there some obvious limitation that wont allow me to batch my terrains?

    Thanks for any help,
    Fressbrett
     
    Fressbrett, Nov 17, 2022
    #1

  2. DevDunk

    DevDunk

    Joined:
    Feb 13, 2020
    Posts:
    4,393
    What unity and URP version are you on?
     
    DevDunk, Nov 17, 2022
    #2

  3. Fressbrett

    Fressbrett

    Joined:
    Apr 11, 2018
    Posts:
    83
    I am using Unity 2021.2.12f1 and URP 12.1.4
     
    Fressbrett, Nov 17, 2022
    #3

  4. DevDunk

    DevDunk

    Joined:
    Feb 13, 2020
    Posts:
    4,393
    Can you check in 2021lts?
    If it's not there I suggest making a bug report.
    I am guessing this is because there usually is only 1 terrain however
     
    DevDunk, Nov 17, 2022
    #4

  5. lc0040

    lc0040

    Joined:
    Aug 7, 2015
    Posts:
    2
    same in Unity 2021.3.3f1 / URP 12.1.6
     
    lc0040, Nov 21, 2022
    #5

  6. funkyCoty

    funkyCoty

    Joined:
    May 22, 2018
    Posts:
    679
    No, and even worse, it actually breaks existing batches in the scene. We ended up writing an alternative terrain shader for our projects.
     
    funkyCoty, Dec 13, 2022
    #6