Some offline renderers use Index of Refraction values to modulate fresnel in the materials. In Unreal Engine, we use the “Specular” value. In this tutorial, we’ll learn how to take Index of Refraction values and properly convert and plug them into the material.
https://dev.epicgames.com/community/learning/tutorials/yG4z/unreal-engine-how-to-convert-index-of-refraction-ior-values-into-an-unreal-material-s-specular-value
1 Like