Well apparently you didnt read either of my posts as both of Franks methods are used here. Realism, no it isnt,  this is where it is up to the person top decide what type of function they wiash to use,this is just a VISUAL example for the poster.the mat file is right above where it says oops in my previous post btw...

"Many are willing to suffer for their art. Few are willing to learn to draw."