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IPR takes ages to start ("compiling geometry")- with GPU it even takes 10min. to start (Vray6, 3dsMax 2022)

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  • IPR takes ages to start ("compiling geometry")- with GPU it even takes 10min. to start (Vray6, 3dsMax 2022)

    Hello,
    when I am using IPR (Viewport or VFB) it takes very long time until the render even starts. My scene has a room wall, a ground and a table, still quite empty, nothing to be concerned about "lot of geometry".
    I'm using 4k maps with UDIM.
    When I start IPR it takes 2 minutes until the render starts ("compiling geometry").

    When I take Vray6 GPU it takes 10 minutes until it starts.

    When IPR starts the render time is okay, but until it starts it takes too long.

    Thanks for help

    - When IPR with GPU starts, it is just horrible slow. Not sure if there is anything GPU needs to get enabled or what can be done . I have 2 x 3090x GPUs.
    Progressive render (default).

    p.s. When I disable "Render Displacement" it renders as expected. (GPU seems less fast than CPU threadripper 3990X).
    If there are other important things, et me know.
    Last edited by BeneZ; 27-07-2023, 03:46 AM.

  • #2
    Hello,

    Would it be possible to sent over your scene to philip.shounev@chaos.com to check those compiling geometry timings and slow-downs on our end ?

    Best regards,
    Philip
    Philip Shounev
    QA department
    Chaos

    philip.shounev@chaos.com

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    • #3
      Is " View-dependent​" in 3D mapping / Subdivision turned on? I was having a similar problem with an Ocean displacement that wouldn't render, stuck on compiling geometry until Max bombed. Turned it off, renders no problem. Didn't seem to affect ActiveShade...but I'm stuck in 2017 and vray 3.7 (things were simpler back then but still seem to get the job done and at least I have a working colour picker!!)​
      Simon

      .... . .-.. .--. .-.-.- .--. .-.. . .- ... . ... . -. -.. -.-. .... --- -.-. --- .-.. .- - .
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      Max2017.1 | Vray 3.70.01| win11
      ASUS Z790PLUS | i9 13900K | 64Gb RAM | Geforce GTX4070Ti

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