I am making some rocks recently. Baking the normal map in blender does not create a very rocky detail for my purpose. I’ve found some useful stuff to share:
GIMP normalmap plugin:
nifelheim.dyndns.org/~cocidius/normalmap/
Create rock texture in GIMP:
blenderartists.org/forum/showthread.php?t=55827
Create normal map for a door:
katsbits.com/htm/tutorials/c … images.htm