It looks even better ^_^ I can only think about adding a soft glow inside the cracks, kinda like if there were lava inside and you can see the light creeping through... That is something you can play around with if you want to. I am happy with it as is, but my mind keeps coming up with stuff to do to it I could probably list off like 10 things but not all of them go well with each other and the one i said was top of list.
I am happy with it as is, but my mind keeps coming up with stuff to do to it