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update documentations with common IOR values

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Mathias Agopian
2019-11-25 17:17:14 -08:00
committed by Mathias Agopian
parent 8d7866b58d
commit 5c80bfe430
1 changed files with 13 additions and 13 deletions
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docs/Filament.md.html
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@@ -681,19 +681,19 @@ n_{ior} = \frac{2}{1 - \sqrt{\fNormal}} - 1
Table [commonMatReflectance] describes acceptable Fresnel reflectance values for various types of materials (no real world material has a value under 2%).
Material | Reflectance | Linear value
--------------------------:|:-----------------|:----------------
Water | 2% | 0.35
Fabric | 4% to 5.6% | 0.5 to 0.59
Common liquids | 2% to 4% | 0.35 to 0.5
Common gemstones | 5% to 16% | 0.56 to 1.0
Plastics, glass | 4% to 5% | 0.5 to 0.56
Other dielectric materials | 2% to 5% | 0.35 to 0.56
Eyes | 2.5% | 0.39
Skin | 2.8% | 0.42
Hair | 4.6% | 0.54
Teeth | 5.8% | 0.6
Default value | 4% | 0.5
Material | Reflectance | IOR | Linear value
--------------------------:|:-----------------|:-----------------|:----------------
Water | 2% | 1.33 | 0.35
Fabric | 4% to 5.6% | 1.5 to 1.62 | 0.5 to 0.59
Common liquids | 2% to 4% | 1.33 to 1.5 | 0.35 to 0.5
Common gemstones | 5% to 16% | 1.58 to 2.33 | 0.56 to 1.0
Plastics, glass | 4% to 5% | 1.5 to 1.58 | 0.5 to 0.56
Other dielectric materials | 2% to 5% | 1.33 to 1.58 | 0.35 to 0.56
Eyes | 2.5% | 1.38 | 0.39
Skin | 2.8% | 1.4 | 0.42
Hair | 4.6% | 1.55 | 0.54
Teeth | 5.8% | 1.63 | 0.6
Default value | 4% | 1.5 | 0.5
[Table [commonMatReflectance]: Reflectance of common materials (source: Real-Time Rendering 4th Edition)]
Table [fNormalMetals] lists the $\fNormal$ values for a few metals. The values are given in sRGB and must be used as the base color in our material model. Please refer to the annex, section [Specular color], for an explanation of how these sRGB colors are computed from measured data.