More then 2 lock screen effects for Galaxy S4?

[VegemiteKid]

I would like to know if there are any more than the two default lock screen effects - being "light" and "water". I've tried Google, but I only get hits on how to customise the screen with widgets and/or layout. I'm not sure if "lock screen effect" is the correct term either, so I may be going wrong there. Just surprised that there are really only 2 effects on such a powerful machine.