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Subsurface Scattering can be used to simulate a wide range of translucent surfaces, including skin, both realistic and stylized
Lightyear © Disney/Pixar
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RenderMan now ships with useful procedural skin presets in the Preset Browser. You can download a more comprehensive pack from our resources page:
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In the parameters below, some of them can be overridden by a PxrLayer when connected to the Input Material or through a PxrLayerMixer. PxrLayerSurface is designed to better illustrate which parameters are not able to be overridden in a layer by including only parameters that are global. We recommend this material when you know you will be layering. The results of these settings are unchanged.
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Path Traced - offers two selections for brute force calculations in subsurface scattering, these provide uncompromising quality and details. The difference between the two is how light falloff is applied.
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Our team has prepared a great set of presets to get started with a diverse set of skin materials:
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You may also find this chart helpful in choosing appropriate settings, make sure to scale them according to your scene units:
| Material | Albedo/Color | Mean Free Path Color (in mm) |
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apple | 0.846 0.841 0.528 | 6.96 6.40 1.90 |
| chicken1 | 0.314 0.156 0.126 | 11.61 3.88 1.75 |
| chicken2 | 0.321 0.160 0.108 | 9.44 3.35 1.79 |
| cream | 0.976 0.900 0.725 | 15.03 4.66 2.54 |
| ketchup | 0.164 0.006 0.002 | 4.76 0.58 0.39 |
| marble | 0.830 0.791 0.753 | 8.51 5.57 3.95 |
| potato | 0.764 0.613 0.213 | 14.27 7.23 2.04 |
| skim milk | 0.815 0.813 0.682 | 18.42 10.44 3.50 |
| skin1 | 0.436 0.227 0.131 | 3.67 1.37 0.68 |
| skin2 | 0.623 0.433 0.343 | 4.82 1.69 1.09 |
| whole milk | 0.908 0.881 0.759 | 10.90 6.58 2.51 |
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Specify trace subset for inclusion/exclusion when struck by a ray indirectly.
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RenderMan Fundamentals
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