I'm trying to convert some of the material properties from 3dsMax to the classic shader in sketchfab. In sketchfab itself there's a slider for Glossiness which goes from 0 to 100. But when I look at the material channels in the API this property is called SpecularHardness and its factor runs from 0 to 10000. Could you tell me how I can convert between these two? It's not a linear or exponential correlation.