The simplest way is probably to find a suitable picture of the materials, or take it yourself, and then apply this to the facet concerned. It's a bit tricky to do this, but it is possible.
Alternatively you can model the velcro... I hope you are using the 64 bit version!
Windows 7 ultimate, Core i7 3.07GHz, 4 cores, 9G memory GEForce GTX 285