Grooved sphere

I was playing Lumen recently and noticed how nice their interface looked with its grooves in metal that glowed, so I tried my hand at it, and I think I've got something that works for practically any image you give it (provided you can make Blender apply it properly to the object in question), though it requires a fair amount of memory during the pre-rendering stage.

We'll see if I can't find a better method later...