The only process that I've been able to really use so far is to load it into Photoshop and play around with the textures in there. But it requires a bit of blurring and editing to get it really seamless. There are a number of tutorials out there though for doing this. If you need links, I can try to locate a few for you. Really depends on if you have Photoshop.

The doctor says I have way too much blood in my caffeine system.