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Roughness map, wait what?

Discussion in 'General Graphics' started by Bombatit, Jul 13, 2015.

  1. Bombatit

    Bombatit

    Joined:
    Sep 4, 2013
    Posts:
    45
    What is roughness map guys, after some googling I think it's like a specular map but it's not, so what are the differences? I can't find an exact document page for it
     
    Last edited: Jul 13, 2015
  2. LaneFox

    LaneFox

    Joined:
    Jun 29, 2011
    Posts:
    7,462
    From what I understand its like Spec + Gloss... Rocks are rough, glass isnt.
     
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  3. Bombatit

    Bombatit

    Joined:
    Sep 4, 2013
    Posts:
    45
    thanks how we can create one? Can I invert the specular map to get Roughness map?
     
  4. theANMATOR2b

    theANMATOR2b

    Joined:
    Jul 12, 2014
    Posts:
    7,790
    Best info I've found is here https://www.allegorithmic.com/pbr-guide
    Roughness is detailed in volume 2, page 10.
    In Unity roughness is defined in the alpha of the metalness map. Please correct if I'm mistaken.
     
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  5. Autarkis

    Autarkis

    Joined:
    Oct 10, 2011
    Posts:
    318
  6. Bombatit

    Bombatit

    Joined:
    Sep 4, 2013
    Posts:
    45
    thank you for the Links ANMATOR and Autakis :D now i get it