I'm not sure if precise textures would matter much, since a serious closeup
of what's happening inside the chip will have to be somewhat cartoonish.

If your character is running away from the BP register to escape a hostile stack
pop, you'd want to show a "street" or "track" that can be walked on.... and I strongly
suspect the real track inside the IC would look like a crude and rough
set of pebbles, hard to distinguish from the surrounding silicon, at such a
magnification. 

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