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The most important things here to adjust are the Single Scatter type, Subdivs and Depth. There is no way to unlink them currently.īefore we proceed with the Diffuse and SSS layers (in the next part of this series), let’s check out Options. This parameter affects both (the Refractions and Reflections). Water based materials (Milk, Juice, Skin, etc.): set it to 1.333 IOR is the same old Index of Refraction that we are so familiar with. Quite simply, Scale 5 gives us Scatter Depth*5, etc. Since this material uses real world units to calculate the final result (you can set the scatter depth in cm a bit further down), this is an easy way to quickly turn up or down the depth. Scale controls the depth of the SSS effect. For most cases, you can leave it at -1 for optimal speed/quality for test renders and objects without small details, bring it down to -3 or -2 but for very detailed objects that show some problem areas, try bringing it up to 0 ~ 1. FastSSS2 calculates the distribution of light within an object using something similar to the Irradiance map, so this parameter sets how detailed we want this calculation to be. Next, let’s look at the Prepass Rate value. Perhaps the only ones that are good “as is,” would be the Milk presets, since it’s a liquid and you may not need any maps. So look at them as more of a starting point than a finished material. They do need to be customized with your own maps to look their best (colors, bump, reflection, gloss). These are pre-defined materials that you can choose from a drop-down menu and quickly use in your scene. You’ll notice that there are a few presets.
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Since this material works in a slightly different way than other V-Ray Materials, let’s look at its settings and some examples of how they work. For this reason, it’s preferable to use the FastSSS2 Material whenever you need to make a translucent shader. Some common examples are: skin, marble, wax, milk, etc.Ĭompared to the “translucency” option in the regular V-Ray Material, it has a far better sub-surface scattering model (SSS). The V-Ray FastSSS2 Material is designed for creating translucent materials (ones that scatter the light inside the object). Currently, the SSS materials in V-Ray for C4D behave differently, so this tutorial will not be as valuable for C4D users. While the images used are from 3ds Max, the same concepts and settings can be used for V-Ray for Maya. We’ll also show specific examples of settings and give you some tricks to use. In this series, we will cover the theory behind many of the features of the material. The following is an in-depth guide to the regular V-Ray Blend Material.