Understanding RedShift Specular Models and SSS in Houdini

Rohan Davli dives into the specular models available within the Redshift Material, when using RedShift Renderer. There are a few components that come into play when making something look shiny and reflective. Reflection and IOR are equally important in that regard.

{pullquote align=“right”] a look at all the various Specular models available in the Redshift Material[/pullquote]

Looking into the Reflection area of a Standard RedShift Material, you have three BRDF functions available. This includes the Beckmann Cook-Torrance model, GGX, and Ashinkhmin-Shirley model. All three basically affect how the roughness of the material will look.

When talking about Specularity, the IOR setting has it’s own options available through a Fresnel Type. You can choose between IOR Advanced, Color + Edge Tint, Metalness or IOR.

Rohan demonstrates the various settings and how they apply to creating different materials. Various metals, plastics, ceramics and their settings are covered. The tutorial also walks through SSS attributes of the RS material shader. You can download the scene file for the tutorial here.