Charvel Desert Crackle finish
Apply a fairly thin and fragile finish and allow it to fully cure. Keep the body someplace quite warm, then quickly transfer into a freezer for a while, then move back into the warm place, then the freezer again. It's the expansion and contraction of the wood under the finish that causes those kinds of cracks.
Once its cracked to your satisfaction you put something of a contrasting colour into the cracks, i.e. a water based dye applied with a cloth and wiped off the surface, or a thin dark wood filler.
Then you can either leave it as is, or apply a clear coat over the top.