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Baking Lightmaps causes jagged shadows help!

Discussion in 'Global Illumination' started by R3fr4ct0r, Apr 6, 2020.

  1. R3fr4ct0r

    R3fr4ct0r

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    2020-04-06 (2).png The map is really big, you can't tell from this picture but it is really massive a person is smaller than half of the orange toothbrush holder you can see on the sink. Also in the console i get "There are 4 objects in the scene below with overlapping UVs" As you can see the shadows are really jagged and just terrible, especially if the player has to be close to them all the time. Please help
     
    R3fr4ct0r, Apr 6, 2020
    #1

  2. kristijonas_unity

    kristijonas_unity

    Unity Technologies

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    Disable lightmap compression and rebake.
     
    kristijonas_unity, Apr 7, 2020
    #2

  3. JenniferNordwall

    JenniferNordwall

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    Hi

    Can you post your settings? And a screenshot of one of the lightmaps?

    For the UV overlap, go to the Scene view and choose the UV Overlap mode to find where the issue is :)
     
    JenniferNordwall, Apr 7, 2020
    #3

  4. R3fr4ct0r

    R3fr4ct0r

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    Here's the settings, i am currently baking without compression and will update you with the results. Keep in mind that i am fairly inexperienced with light baking so i could use some tips especially for a giant map like this :)
     

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    R3fr4ct0r, Apr 8, 2020
    #4

  5. JenniferNordwall

    JenniferNordwall

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    Hi! One thing to add that might be causing you to bake way too many lightmaps for a rather simple scene (albeit big). The lightmap resolution is set to 40 texels per unit. A unit is 1 meter in Unity, and since 1 meter in your scene (your 2 m tall human) is so insignificant, you might want to cut down on this. Try maybe 10 or 20 (or even lower) and see how that goes for you baking time. You can turn of Prioritize View and move around whilst baking to see what the progress looks like :)

    You should probably also increase your samples and use at least 256 indirect samples. Try lowering your AO distance since this might also cause this effect. You can also try running you bake with some different type of filtering. I think you lightmap will be super noise with such a low sample count, causing the filtering to smudge it way too much.

    Also, I did some beginners talk on Youtube that explains all the settings. Search for "Baking at the speed of light" or (slightly older)"Bake it til you make it". That might bring you up to speed on most settings :)
     
    Last edited: Apr 8, 2020
    JenniferNordwall, Apr 8, 2020
    #5
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  6. R3fr4ct0r

    R3fr4ct0r

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    Ok so i tried various different settings and everything seems normal except these strange lines that appear on objects, i increased the Indirect (from 40 to 256) and Direct (from 36 to 50) samples. Lowered the ambient occlusion from 900 to 200 and this is the result. There's still these lines on objects. Also it says that 7 objects' UVs now overlap and when i use the scene view mode "UV overlap" there's literally no Red lines to be seen on the objects that unity says are overlapping. Really messy stuff and the strangest thing is that before i redesigned my bathroom everything was silky smooth with the older settings. Is it possible that adding more objects messed something up in the scene lighting? I am pretty new on this stuff

    EDIT: By redesigning i mean just adding a few objects here and there and changing older textures with new ones.
     

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    R3fr4ct0r, Apr 12, 2020
    #6

  7. kristijonas_unity

    kristijonas_unity

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    Those gradients that you are seeing are most likely caused by the lightmap compression. Go to Lighting Settings > and uncheck Compress Lightmaps checkbox. Alternatively, you could override the the lightmap texture format in the texture importer: https://docs.unity3d.com/Manual/class-TextureImporter.html
     
    kristijonas_unity, Apr 14, 2020
    #7

  8. R3fr4ct0r

    R3fr4ct0r

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    It was the first thing i tried and it didn't work, gave it another shot later last night and it's still the same.. I really have no clue what could be causing this
     

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    R3fr4ct0r, Apr 16, 2020
    #8

  9. KEngelstoft

    KEngelstoft

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    Please go to Project Settings > Player > Lightmap Encoding and make sure that it is set to High.
     
    KEngelstoft, Apr 16, 2020
    #9

  10. R3fr4ct0r

    R3fr4ct0r

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    Didn't work. Baked it again and it's the same results. What boggles me even more is that before, with the old settings everything was fine (i also had less objects and less detailed textures) Could this be the root of the problem?
     
    R3fr4ct0r, Apr 17, 2020
    #10

  11. KEngelstoft

    KEngelstoft

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    I am wondering if these harsh gradients are present in the baked lighting or only in the final output? Please supply a screenshot of that view mode. Thanks!
     
    KEngelstoft, Apr 17, 2020
    #11
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  12. R3fr4ct0r

    R3fr4ct0r

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    Here it is at the start: here it is after 20 minutes: after 50 mins: after 3 hours: 1 hour away from the end where i fell asleep: should i rebake and send just-before-the-end screenshot?
     

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    R3fr4ct0r, Apr 18, 2020
    #12