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[HDRP] Lite Shader: What is a "Subsurface Mask Map"?

Discussion in 'Graphics Experimental Previews' started by OfficialHermie, Jul 26, 2018.

  1. OfficialHermie

    OfficialHermie

    Joined:
    Oct 12, 2012
    Posts:
    585
    Hello!

    I would understand what "Subsurface Map" is, but I don't understand what a "Subsurface Mask Map" is.
    Is it the same, just with a "more correct" naming, or something else?

    Thank you.
     
    OfficialHermie, Jul 26, 2018
    #1

  2. Lurking-Ninja

    Lurking-Ninja

    Joined:
    Jan 20, 2015
    Posts:
    9,900
    Lurking-Ninja, Jul 28, 2018
    #2
    Mashaaky likes this.

  3. OfficialHermie

    OfficialHermie

    Joined:
    Oct 12, 2012
    Posts:
    585
    @LurkingNinjaDev The following is not clear to me:

    It's called a "Mask map", but the Green channel is for AO. I don't think it's an AO mask, right?
    So I don't understand why it's called Mask map.
    Do you know what I mean?

    Also, if I may ask... the page you pointed me to states

    "Subsurface mask map:

    This map uses the red channel to manage the visibility (0 = not visible, 1= totally visible) of the SSS effect. This map is modulated by the handle value (0 to 1, 1 is the default)."

    What does "1" and "0" mean here?
    White and Black?

    Thanks in advance!
     
    OfficialHermie, Jul 30, 2018
    #3

  4. one_one

    one_one

    Joined:
    May 20, 2013
    Posts:
    621
    The red, green, blue and alpha channel of an image do not necessarily have to contain color information. They can hold any arbitrary byte value between 0 and 255. So instead of storing colors, images/textures can also be used to store 3 (4 if you use RGBA) grayscale textures. And yes, 1.0 = 255 = white = 100% AO / 100% SSS and so on.
     
    one_one, Jul 31, 2018
    #4