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Graphics Global Illumination horribly slow since 5.3

Discussion in '5.3 Beta' started by TomasRiker, Nov 16, 2015.

  1. TomasRiker

    TomasRiker

    Joined:
    Jan 26, 2012
    Posts:
    48
    Since version 5.3, I'm getting horrible performance of real-time Global Illumination.

    As soon as I do real-time changes to any parameter of my sun light source (position, direction, intensity, ...) or update my sky box texture, it introduces strong spikes in the frame duration (several hundred milliseconds) that occur about every second.

    Unfortunately, this makes the game/simulation completely unplayable with Global Illumination enabled.

    Prior to 5.3, everything was running smoothly. I was always using the latest Beta versions.

    I attached a screenshot of the Unity Profiler output and the Windows Task Manager. CPU usage is always around 50-60%, no spikes are to be seen there.

    Also note that Global Illumination is not showing up in the Unity Profiler, although there is a red "Gi" item in the legend! The spikes we see in the other tasks are most probably the result of the Global Illumination spikes that aren't visible for whatever reason.

    Screenshot (click to enlarge):
    Screenshot.jpg
     
    Last edited: Nov 16, 2015
  2. Alex-Lian

    Alex-Lian

    Guest

    Do you have a bug report with something we can test with?
     
  3. TomasRiker

    TomasRiker

    Joined:
    Jan 26, 2012
    Posts:
    48
    Uploading my project ... will take some time. I will post here when it's done.
     
  4. TomasRiker

    TomasRiker

    Joined:
    Jan 26, 2012
    Posts:
    48
    Done! The ticket ID is: 745096_b7p6cg9mmqtj498i
     
  5. Alex-Lian

    Alex-Lian

    Guest

    Thanks. Advanced it a bit in our QA pipeline.