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Graphics OnRenderImage is being called twice per frame on some scripts

Discussion in '5.4 Beta' started by anollan, Jun 17, 2016.

  1. anollan


    Jul 4, 2015
    I'm encountering a sneaky bug, where some of my post-process effects are done twice in a row, because OnRenderImage is being called twice per frame. Here are some more details:
    - Occurs on Beta21, and previous betas.
    - Confirmed that OnRenderImage is called twice through log output, and by looking at a graphics capture.
    - Occurs in a built version (Win32), but not in the editor.
    - Only occurs on a few of the post process effects, and different ones depending on the scene.
    - If it happens on a certain effect on a certain camera, it always happens (repeatable).
    - Toggling Graphics Jobs doesn't affect it.

    I have created a workaround, where I return from OnRenderImage early if it is called a second time per frame, but this still costs a Blit. Also, I may have missed other locations where this is occurring.

    Is this a known bug? I'm apprehensive to create a repro case, since I suspect it will disappear once I try simplifying the case, but will attempt to create a repro if necessary.

    MrEsquire likes this.
  2. Alex-Lian



    Could we get a bug report please? Please post the #.

    Repro project definitely ideal, but at least which effects
  3. Silent8Strike


    Mar 10, 2014
    Is it possible to get an update on this issue (814402)? Pretty much destroys our visuals right now, as double processing image effects like bloom is a very bad thing.

    This is the only major issue we've encountered migrating to 5.4 so far.
  4. CarlosRincon


    Unity Technologies

    Jan 28, 2016
    Hi, this is with our developers and we're aiming to address it in a patch soon after the 5.4.0 release.