Convert a specular exponent (e.g. phong or blinn) to roughness
Uses the conversion from - http://simonstechblog.blogspot.com/2011/12/microfacet-brdf.html
The shinyness exponent/𝛼 to convert to roughness
The resultant roughness.
Convert a specular exponent (e.g. phong or blinn) to roughness
Uses the conversion from - http://simonstechblog.blogspot.com/2011/12/microfacet-brdf.html