Here's a little discovery I just made, thought I would pass it along. You know those annoying little white spots you sometimes get in your displacement maps? I usually go into Photoshop and pick them out with the stamp tool. If you've ever tired it, you know it can be very annoying to do on a 32 bit image since a lot of the halftones show up as solid black and you can't really see what your doing. So, what I do now is I create an adjustment layer first, using exposure. Move the sliders around until the solid blacks become gray scale and you can see all the wrinkles and folds. Then you can stamp out just the white spots without going into any of the other areas that are okay. Then just delete the adjustment layer and save. Sometimes it also helps to take a UV snapshot from Maya and put it on top as another layer, just to help orient yourself to the model.