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PBR value lists?

polycounter lvl 8
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Olli. polycounter lvl 8
does anyone have extensive lists of albedo/spec

ive got this IOR list which is extremely handy, and it would be nice to have a similar resource for albedo and specular (especially metals)

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  • passerby
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    passerby polycounter lvl 12
    i tend to use this as a reference a lot
    materialref01.png

    small list but you can use base values and make assumptions from it
  • stevston89
  • Olli.
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    Olli. polycounter lvl 8
    just found these:
    ALBEDO:
    
    New asphalt, 0.04 - 0.05
    Black acrylic paint, 0.05
    Aged asphalt, 0.1 - 0.12
    Conifer Forest, 0.08 - 0.15
    Bare soil, 0.17
    Deciduous trees, 0.15 - 0.18
    "White" asphalt shingle, 0.2
    Green grass, 0.25
    Aged concrete, 0.2 - 0.3
    Desert sand, 0.4
    New concrete (traditional), 0.4 - 0.55
    Ocean ice, 0.5 - 0.7
    New concrete with white portland cement, 0.7 - 0.8
    White acrylic paint, 0.8
    Fresh snow, 0.8 - 0.9
    Water, 0.03 - 1.0
    
    Old/melting snow  0.40 - 0.80
    Tundra 0.2
    
    Soil (Dark/Wet) 0.05 
    Soil (Light/Grey) 0.4
    Sand 0.15 - 0.45
    Ice (Sea) 0.3 - 0.45
    Ice (Glacier) 0.2 - 0.4
    
    white asphalt shingle - 0.2
    galvanized steel - 0.24
    terra cota tile - 0.28
    tar & gravel - 0.33
    
    magnesium oxide - 0.96 [D]
    alabaster - 0.92 [D]
    polished silver - 0.88-0.93 (S)
    white gypsum - 0.85 [D]
    fresh snow - 0.75-0.78 [M]
    mirror - 0.72-0.85 (S)
    matte silver - 0.7 [D-S]
    polished aluminum - 0.65-0.75 (S)
    polished chrome - 0.6-0.7 (S)
    matte aluminum - 0.55-0.6 [D-S]
    white paper sheet - 0.6-0.7 [D-S]
    melting snow (clean) - 0.6-0.62 [M]
    matte chrome - 0.5 [D-S]
    plaster - 0.4-0.45 [D]
    natural silk fabric - 0.35-0.55 [M]
    batten (fresh wood) - 0.35-0.42 [D-S]
    face skin - 0.25-0.35 [M]
    white dry sand - 0.24-0.32 [D]
    yellow clay - 0.16 [D]
    batten (old, weathered) 0.12-0.16 [D-S]
    white wet sand - 0,11-0.2 [D]
    dry asphalt - 0.1-0.18 [M]
    black soil (dry) - 0.07-0.08 [D]
    wet asphalt - 0.06-0.08 [D-S]
    summer foliage - 0.09-0.12 [D-S]
    conifer - 0.08-0.12 [D & D-S]
    autumn foliage - 0.15-0.3 [D-S]
    black soil (wet) - 0.02-0.05 [D-S]
    black velvet - 0.01-0.03 [D]
    
    D - diffuse
    S - specular
    M - mixed
    
    https://corona-renderer.com/forum/index.php?topic=2359.0
  • stevston89
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    stevston89 interpolator
    @ Olli - Note those are linear values that don't have color. You would have to convert the linear values to srgb to use them and then you would have to ad color to that value. Also that is just for albedo which is less of an issue than having proper reflectivity/spec.

    Also I wouldn't trust anything that doesn't come from an extremely credible source. Like Epic/Unreal, Cryengine, Marmoset, Quixel, etc.
  • s6
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    s6 polycounter lvl 10
    Exactly what I was about to say, Stevston. I was going to ask if we (or the guy on the corana forum) knows where they came from to confirm the accuracy of the values.

    Thanks for the links BTW. Great info.
  • radiancef0rge
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    radiancef0rge ngon master
    stevston89 wrote: »
    @ Also I wouldn't trust anything that doesn't come from an extremely credible source. Like Epic/Unreal, Cryengine, Marmoset, Quixel, etc.

    what makes a source extremely credible? is it some process they use?
  • marks
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    marks greentooth
    The albedo values in that list are pretty accurate afaik.
  • s6
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    s6 polycounter lvl 10
    what makes a source extremely credible? is it some process they use?

    Capturing physically accurate materials is a complicated and costly process from what I've been told

    So when a random guy on a forum(the carona forum, not referring to Olli) provides a list like the one above, it's either from a reputable source (like Steveston listed) or came out of thin air.

    Like Marks said though, they seem close enough, even if they are off.
  • deolol
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    deolol polycounter lvl 6
    This is kind of a noob question but how do we convert these values in photoshop? :P
  • Froyok
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    Froyok greentooth
    With a bit of Pow() of course ! :poly142:
  • beefaroni
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    beefaroni sublime tool
    Wow a lot of great resources.

    In addition, when Megascans and Substance Designer ships with PBR Gametextures materials it should be easy to get the values.
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