So one of the under-discussed shader effects we have now is bumpmapping. It's a great effect, as shown in the Ghost Shooter demo, I just... have no idea how to utilize it.
If anyone's taken a look at the capx for the demo, can you explain exactly what Ashley did to the bumpmapped sprite? It's all blue and pink and whatnot. I just don't get how the whole thing works really, I just know the end result looks good!