Err, I think is where the rest of filter is. :P The preset pattern or rather texture helps to define the general background of the fabric. To enhance the realism, ie roughness of the material, sharpen it a little after using gradient map to enhance the shades of the weaving. Since the material is rough, of course light reflection is minimal, a dull colour might help. But then that is just what I will try on a 2D picture. Not sure if that is your intention and I am sure there is a better way out there which give better results. Hope this help a little.