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GPU lightmapper preview

Discussion in '2018.3 Beta' started by KEngelstoft, Sep 26, 2018.

  1. Gametyme

    Gametyme

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    How large is your scene? I believe I currently have 12-15 512x512 terrains lined up.
     
  2. Stardog

    Stardog

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    Is there a reason for lightmapping 15 terrains?
     
  3. Gametyme

    Gametyme

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    I’m using gaia and it requires a square terrain. The game I’m making is a rail shooter similar to starfox so I had to line them up.
     
  4. sendspace

    sendspace

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    hello
    i have not tried the beta 6 since unity 2018.3 b3 ... myQ is did you guys fixed the cpu fall back issue.
     
  5. GenOli

    GenOli

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    Large city map, currently around 2 million polys, will probably be a lot more once finished (AAA game).

    Really not looking forward to have a PC locked up baking this for a week whereas if Unity gets this GPU baker sorted I could have it done in a day easy.

    Tried real-time lighting but it's just too basic.
     
  6. Reanimate_L

    Reanimate_L

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    @KEngelstoft it seems gpu lightmapper stalling when Shader Graph are opened, it stuck at "0/2 Ambient Probes | 1 Jobs".
    and if i close shader graph it continues
     
  7. KEngelstoft

    KEngelstoft

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    We will try this on our end, thanks for reporting it!
     
  8. GenOli

    GenOli

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    Seems GPU baker still can't handle large scenes in Beta 10.
     
  9. sendspace

    sendspace

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    hello , am i the only one who cant make gpu baker to work, it cant detect my gtx 1050 ti. and just stuck between falling back to cpu, i have the same issue with other opencl 3d apps. i am using the latest driver. Edit: In gpuz opencl is enabled.

    Console spam with:
    OpenCL Error. Falling back to CPU lightmapper. Error callback from context: CL_INVALID_PROGRAM

    Red warning:
    Failed to find a suitable OpenCL device, falling back to CPU lightmapper.

    Edit2: When i reverted back to NV driver version 399.24 Unity gpu baker and all other opencl apps are workin just fine. i hope Nv guys fix the issue with latest drivers.
     
    Last edited: Nov 20, 2018
  10. GenOli

    GenOli

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    Do you also have an internal (intel) graphics card?
     
  11. sendspace

    sendspace

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    The problems was latest nvidia drivers have issue with opencl, i have my intel gpu disabled in bios. the old nvidia driver works fine. i hope that nvidia is not trying to kill opencl :(
     
  12. GenOli

    GenOli

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    Tried downgrading?
     
  13. sendspace

    sendspace

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    Yes, to version 399.24 and it worked fine. maybe gpu baker must be updated to what ever nvidia did for its opencl.
     
  14. sendspace

    sendspace

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    Edit: problem fixed with latest driver by removing the opencl shipped with unity, thus using opencl version from system32.
     
  15. GenOli

    GenOli

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    I ended up buying Bakery (gpu lightmap baker asset), it just works, even with massive scenes, it's on sale at the moment.
     
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  16. Thall33

    Thall33

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    You don't have to roll back that far. I narrowed down to 411.63
     
  17. Thall33

    Thall33

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    I've been doing testing of the GPU vs CPU progressive light mapper since its preview release, besides sharing the bugs that everyone else has its been really impressive, but I wanted to bring up a quality comparison.

    Every test from each .13 beta release and 2019 alpha release has given me the same results as in the example below.

    Each comparison bake was used using the exact same settings.

    Cpu: Excellent results, a pretty clean finish (19min bake)



    GPU: Excellent bake time (14 seconds!), but the result is pretty blotchy and not clean.



    So my real question is, can we expect better, and consistent quality in the future? I understand this is preview, I just haven't seen anyone else mention this before and I think its an important topic as this is a major feature for reduced studio production time. I would really appreciate a response from a Unity developer on this, Thank you for your time :)
     
  18. Gohaleg

    Gohaleg

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    I'm also getting the "Loaded programs and built CL kernels in ..." error. I'm on a GTX1080, drivers version is 416.81. The weird part is that there are two options "Progressive CPU" and "Progressive GPU" and both do the same and show the same error:

    OpenCL Error. Falling back to CPU lightmapper. Error callback from context: CL_INVALID_PROGRAM
     
  19. Thall33

    Thall33

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    If you read the solutions above, download nvidia driver 411.63, last/recent working one I could find. This is the way it is until patches are out for betas/alphas.
     
  20. AcidArrow

    AcidArrow

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    The CPU is slightly noisy as well I think. Just bump the indirect samples (like 1024 should be more than enough I think).
     
  21. fguinier

    fguinier

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    Hi Thall33,

    The goal is to have the GPU and CPU version at a similar quality level when the GPU version will be out of preview :).
    By the way: We continue to improve the CPU lightmapper while doing the GPU one, so quality will be raised in general.

    Florent
     
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  22. optimise

    optimise

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    Hi @fguinier, is there any plan to add graphics card selection UI at Lighting Window anytime soon?
     
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  23. fguinier

    fguinier

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    We will soon select automatically the main graphics card (ie the one used for unity editor rendering) for baking automatically. Meantime https://forum.unity.com/threads/gpu-lightmapper-preview.561103/ explain how to select the right device.
     
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  24. sendspace

    sendspace

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    Looks like many ignored my solution for opencl issue;
    Just remove OpenCL.dll in editor folder and you are good to go with latest driver.
     
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  25. Thall33

    Thall33

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    Thanks, I'll try this out!
     
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  26. Lars-Steenhoff

    Lars-Steenhoff

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    Is this always the best card? I'm planning to use my MacBook Pro with an external video card. ( eGPU enclosure)
    The MacBook Pro has 2 cards inside
    Radeon Pro 460 4096 MB
    Intel HD Graphics 530 1536 MB

    I would normally use the Radeon Pro 460 for the unity editor. and external Nvidia RTX card for rendering light maps. ( external card with no monitor attached )
     
  27. KEngelstoft

    KEngelstoft

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    If the eGPU is listed as an available device in the editor log (look for -- Listing OpenCL platforms(s) -- in the log) it can be used for baking.