Search Unity

  1. Welcome to the Unity Forums! Please take the time to read our Code of Conduct to familiarize yourself with the forum rules and how to post constructively.
  2. We have updated the language to the Editor Terms based on feedback from our employees and community. Learn more.
    Dismiss Notice
  3. Join us on November 16th, 2023, between 1 pm and 9 pm CET for Ask the Experts Online on Discord and on Unity Discussions.
    Dismiss Notice
New Forum User Notice Update to the Unity Editor Software Terms Unite 2023 - Ask the Experts Online

Why lightmapping artefacts with Directional but not Directional Specular?

Discussion in 'Global Illumination' started by ArachnidAnimal, Oct 7, 2015.

  1. ArachnidAnimal

    ArachnidAnimal

    Joined:
    Mar 3, 2015
    Posts:
    1,727
    I have not had one good experience trying to use compressed Directional lightmaps. There are always artefacts that appear in random locations throughout the scene. However, I never run into these issues using Directional Specular light maps.


    lightBaking.png

    These issues occur using compressed baked GI
    What could be causing this, and why does it occur for Directional but not directional specular?
    Is there some tips on avoiding this?
    Thanks
     
    ArachnidAnimal, Oct 7, 2015
    #1

  2. AcidArrow

    AcidArrow

    Joined:
    May 20, 2010
    Posts:
    11,021
    Those artifacts look like a bug to me actually. Maybe a bug report is in order?
     
    AcidArrow, Oct 7, 2015
    #2
    ArachnidAnimal likes this.

  3. ArachnidAnimal

    ArachnidAnimal

    Joined:
    Mar 3, 2015
    Posts:
    1,727
    Well it happens in every scene of mine, and regardless of the mesh / model. If it is a bug like you suggest, hopefully Unity allready knows about. But I'll submit a bug report soon. It really doesn't make sense that it would work for Directional Specular but not Directional.
     
    ArachnidAnimal, Oct 7, 2015
    #3

  4. AcidArrow

    AcidArrow

    Joined:
    May 20, 2010
    Posts:
    11,021
    Don't know what to tell you, I haven't seen an artifact like that, it looks like a bug to me.
     
    AcidArrow, Oct 7, 2015
    #4

  5. KEngelstoft

    KEngelstoft

    Unity Technologies

    Joined:
    Aug 13, 2013
    Posts:
    1,366
    It doesn't look like compression artefacts, it looks like uninitialized memory to me. Please file a bug report.
     
    KEngelstoft, Oct 7, 2015
    #5

  6. ArachnidAnimal

    ArachnidAnimal

    Joined:
    Mar 3, 2015
    Posts:
    1,727
    Submitted bug report: 734187

    To Reproduce:
    1. Open the attached scene
    2. Verify the GI cache location is set up. (The attached repo allready contains a GICache folder in the zip file)
    3. Notice the "green/white sections". This happened after baking a compressed Directional Lightmaps.
    4. Do rebakes: notice the issue does not occur with Non-Directional or Directional Specular lightmaps. The problem only occurs with Directional Lightmaps
     
    Last edited: Aug 18, 2016
    ArachnidAnimal, Oct 7, 2015
    #6

  7. ArachnidAnimal

    ArachnidAnimal

    Joined:
    Mar 3, 2015
    Posts:
    1,727
    The bug was verified and re-produced by QA.

    Hi,
    Thanks for reporting the issue.
    I have been able to reproduce the issue and will pass it on to the developers for resolution.
    ...
    QA Team
    ...
     
    ArachnidAnimal, Oct 9, 2015
    #7
    ImpossibleRobert likes this.

  8. Zaz1996

    Zaz1996

    Joined:
    Sep 21, 2015
    Posts:
    4
    Zaz1996, Nov 4, 2015
    #8