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Post processing component adds pixel noise on enable.

Discussion in 'Image Effects' started by noisetree, Oct 25, 2019.

  1. noisetree


    Apr 10, 2015
    Hello, i have a problem with post-processing v2 (ver. 2.1.7, unity 2019.2.10, 2d project). When i enable post processing layer on camera (checked this on personal and clean projects, without any volume) the image appears pixelated (not clean, like some pixel noise). This noise is moving on play. It's not clearly visible, but it's there. Noticed it cause my gif record with same dimensions grew 5 - 10 times. Maybe miss some settings? Tried lwrp with same results

    clean (without post processing enabled):

    pixelated (with post processing enabled):
  2. SVC-Games


    May 21, 2013
    Agreed, there's some pixel noise generated that dissapear as soon as I disable.

    Here's with Post processing layer Disabled:
    Post Process Layer OFF.png

    And here's how it looks with the post processing layer enabled:
    Post Process Layer ON.png

    Since it may be hard to see in some monitors, I've converted the image to black and white and increased contrast by 35%:
    Post Process Layer ON - BW 35Contrast.png

    Also I've used the 2D Pixel Perfect Camera package so pixels could be seen bigger (they are also visible if you zoom the game view with a resolution such as 720p).

    It's something similar to TV Signal noise. Out of Play mode the pixels are static unless you change something through Unity editor.

    Attached Files:

  3. GoGoGadget


    Sep 23, 2013
    It's Unity's "magic dither" that does that, whether you like it to or not AFAIK. Hurts performance on low-end mobile as well. Only way I know to get rid of it is to manually edit it out of Unity's uber pass.