I have no idea what you're talking about, usually viewport rendering is much better for skinning because it actually shows how it looks, rather than a render that puts a filter over your work, and blurs/changes it in various ways.
Just to be sure, I hope u understand i ment look in your driver options, because i use ATI tray tools, i have to alter my settings there before I open max... my last post wasnt very clear on that :x