IMHO, we never think about texture. I see nylon and cotton twill camo shirts. Those fabrics are shiny and slick, therefore reflect light.
I have an A.C.U. shirt that I "ghillied up" just on top of the arms and shoulders for warm weather.
Recently I smeared a thin coat of mud (splotches) on the "light" areas of the shirt and pants not covered by the "ghillie stuff".
The rough texture and dull surface of the mud makes an amazing difference. I think mud splotches would help any camo clothes.
I did make a ghillie suit with burlap, the burlap is by far the best ever, the rough texture makes it disappear even at 14 yds.
I like wool too, good texture. That's why you can't see a plain brown deer, his hair diffuses a lot of light.