Changes between Version 12 and Version 13 of material


Ignore:
Timestamp:
Aug 8, 2014, 3:01:01 PM (4 years ago)
Author:
angrypig
Comment:

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  • material

    v12 v13  
    2020== Textures notes==
    2121
    22 If texture is not defined it's replaced by small texture with default values:
    23 albedo: 255,255,255 / 1.0,1.0,1.0
    24 normal: 127,127 / 0.5,0.5
    25 roughness: 255 / 1.0
    26 opacity: 255 / 1.0
    27 reflectance: 255 / 1.0
     22If texture is not defined it's replaced by small texture with default values:[[BR]]
     23  albedo: 255,255,255 / 1.0,1.0,1.0[[BR]]
     24  normal: 127,127 / 0.5,0.5[[BR]]
     25  roughness: 255 / 1.0[[BR]]
     26  opacity: 255 / 1.0[[BR]]
     27  reflectance: 255 / 1.0[[BR]]
    2828
    2929=== Color space sRGB/Linear===
     
    4545F0 defines material characteristics, basically it means how much light is reflected from the material and how much light is reflected as diffuse. For standard dielectric materials it's usually 0.04 (4%) and it means 4% light is reflected from the material if we are looking at surface perpendicularly.
    4646Final F0 value is computed by equation F0 = f0 * tex_reflectance;
     47
     48Reflectance map is used if two very different materials are needed in one texture for example leather book cover with gold lettering. This approach is much easier than splitting mesh.
    4749
    4850Example F0 values:
     
    6769[http://seblagarde.wordpress.com/2011/08/17/feeding-a-physical-based-lighting-mode/][[BR]]
    6870[http://seblagarde.wordpress.com/2012/04/30/dontnod-specular-and-glossiness-chart/]
     71[http://www.crytek.com/download/fmx2013_c3_art_tech_donzallaz_sousa.pdf]