I was trying to figure out how to make that work, then I realized what I was doing wrong. Hard to describe, so I'll just show what I have to offer for an Ultra Ball:
Still having trouble with the Great Ball, but that's because it actually has extended tabs that don't fit within the confines of the sphere. I'll be giving it another shot in a minute.
EDIT: Just realized it doesn't have the same shine as the Pokéballs that have already been made…gonna try to fix that too.
EDIT2: Okay, updated the image. *points above*