// Convert Specular to IOR // SpecularToIOR.osl, by dubcat // Modified: 2021-02-17 // Copyright 2021 dubcat shader SpecularToIOR [[ string help = "Convert Specular to IOR", string label= "Specular to IOR", string category = "Math\Float" ]] ( float Input = 0.0, output float Out = 0.0, ) { Out = 1 / ((2/(sqrt((0.08*Input))+1))-1); }