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Darkness Overblows the Image [SOLVED]

Discussion in 'High Definition Render Pipeline' started by Littlenorwegian, Aug 2, 2020.

  1. Littlenorwegian

    Littlenorwegian

    Joined:
    Oct 19, 2012
    Posts:
    139
    Hello,

    Still a bit new to HDRP and doing some interesting things.
    However, I am having a problem. I essentially want to remove all lights from a scene (Have it be dark) and re-introduce lights, but there's a strange thing that occurs which is, if I add anything dark to a scene.

    Even an unlit black box it overblows the image as seen here.
    https://www.dropbox.com/s/w88q3jra7fu4fg6/HDRP.mp4?raw=1
    (I add a black box. And then I make the camera background black)

    I've been testing with render setting and the like, but cannot really understand why this occurs and how to just have a dark, unlit scene. (Essentially, the sky is giving me too much light, is the problem)
    https://www.dropbox.com/s/hqbgqth02vhilia/Sky.mp4?raw=1
    (Here you can see I turn off the sky, get the result I want before it overblows the image again)

    This happens as well with standard HDRP material.
     
  2. foonix

    foonix

    Joined:
    Dec 15, 2019
    Posts:
    11
    Are you using auto exposure? I've had trouble wrangling auto exposure to produce reasonable results in dark scenes. Even a tiny amount of light causes the exposure to go way negative (makes everything brighter) until the bloom explodes across the screen. Try a fixed exposure volume override.

    Edit: Note also that the default exposure settings are .. questionable. Default exposure ranges from -10 to 10 and default fixed exposure is 0. See the wikipedia page on exposure if you want to use light ranges that are physically plausible. 12 is probably a good starting point.

    https://en.wikipedia.org/wiki/Exposure_value#Tabulated_exposure_values
     
    Last edited: Aug 2, 2020
    Littlenorwegian likes this.
  3. Littlenorwegian

    Littlenorwegian

    Joined:
    Oct 19, 2012
    Posts:
    139
    Thank you, @foonix ! It was the exposure compensating, it seems.

    VERY powerful the HDRP, but it has many knobs and buttons.
     
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