Advanced material settings

Hi,where i can find the Tutorial about rhino material setting? i know the basic setting of custom and textures. but in advanced setting,i am not clear,for example,what the Reflection polish mean,if it won’t work when reflectivity (in custom setting) is 0? if yes,what else parameters are linked?
when i assign a texture and get into it, most of the parameters confuse me,including color mask and tolerance, the 5 Mapping styles,Graph,and so on.

Hello - please see



Here is a quick video on setting materials: