Creating Surface textures for sculpties with blender

As for the blurring, my guess is what you're seeing is the result of a flat lighting bake on a texture that's supposed to look bumpy, but doesn't actually have a bump map applied to it. Prior to the bake, the color noise on your flat texture served to provide an illusion of depth, to some degree. But once you baked lighting onto it, that illusion was broken, as light and shadow spread evenly across the surface. The result is the baked texture looks pixelated instead of bumpy. For lack of a better phrase, the lighting bake called the original texture's bluff. It proved it was just a flat image.What I would suggest is that you make a new source texture, without the noise. Then apply a proper bump map in Blender to create the depth. If Blender can generate 3D volume noise, that would work quite well for this. If not, then a 2D noise map, projected either either cubically or tri-planarly, should do the trick.As I said, that's just a guess. I'm not a Blender user, so I can't speak from actual experience. I'm mainly drawing on parallel experience from Maya. It may or may not be applicable, but it's worth exploring.