Quote - And, just to add on what Robyn and ManOfSteel have already posted, most of your best bump maps generated are hand drawn.

 

I have purchased almost every high-quality V4 skin available  and I have NEVER ONCE seen a "hand painted" bump map.  I don't know why everyone keeps telling people who are trying to learn that they are going to have to "hand paint" everything.  From what I have seen, most of the bump maps are grey-scaled images of the original with eyebrows, veins, moles, etc. corrected.  This is fairly simple to do in Photoshop.  I have also seen a couple of bump maps made using the emboss filter.  The best I have seen are made using (primarily) the high-pass filter. Even DAZ's "Elite" texture bump maps are not "hand painted".  I've been using photoshop for so many years that I can look at one of these bump maps and figure out either exactly how it was done, or at least how to recreate the effect in PS.  I was able to recreate this particular DAZ Elite bump map using a combo of greyscale, highpass filter, blending modes, then correction of the eyebrows and a buttload of sharpening on the lips.  The solarize filter can also come in handy for bump map and specular map creation.    Just play around a bit and see what works best for you... it's really not that difficult.   I'd say it's actually more of a matter of learning photoshop and everything it can do.