I was wondering if anyone could explain to me how Darknut's texture sharpening/detailing method works? I've been messing around with various textures (mostly from the TR armors) trying to match them up with Darknut's work, but I can't find the proper method. I believe he uses an emboss filter, is that correct?

I would be very happy if anybody can share some more general texture detailing tips and tricks, as well.