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Does real-time GI affect GPU or CPU perfomance?

Discussion in 'Global Illumination' started by radionix3d, Jan 21, 2016.

  1. radionix3d

    radionix3d

    Joined:
    Oct 25, 2015
    Posts:
    29
    So we decided to switch to fully realtime lighting in our game and now it seems that we're CPU bound because no matter what settings we use except the lowest we have the same framerate. We haven't yet started optimizing the scene, killing lights, shadows, etc but I was wondering if realtime lighting is CPU bound. Is it so? or does it affect GPU the most?
     
    radionix3d, Jan 21, 2016
    #1

  2. idurvesh

    idurvesh

    Joined:
    Jun 9, 2014
    Posts:
    495
    Yes, Realtime GI is CPU bound, the proof of that is you can see "GI" option under CPU usage on profiler.....

    We tried to implement realtime GI to our mobile game but FPS we got were 8-10 whereas with Baked GI we got 40+
     
    idurvesh, Jan 24, 2016
    #2

  3. radionix3d

    radionix3d

    Joined:
    Oct 25, 2015
    Posts:
    29
    thanks, you can also partially limit its usage in lighting tab settings.
     
    radionix3d, Jan 26, 2016
    #3