Shooting basketballs off the glass is something of a lost art, at least outside of point-blank layup range. Not too many people bother to invest the effort to learn the geometry to bank shots from each particular spot on the floor, compared to shooting for the rim, where your aim point and mechanics are pretty much always the same.
It's rare enough nowadays that it was something of a signature move for players like Tim Duncan.
https://www.wired.com/2011/07/st_cheatsci_basketball/
https://hiphopandhoops.wordpress.com/2011/04/14/bank-it-stud...
A quick look shows some interesting starting points that goes with my "gut" about basketball and banking off the backboard.
I don't see any similar articles relating the two (banking Basketballs and banking Skeet Balls), but I bet there's some sweet spot that you aim for and get better with practice.