I’ve noticed that when trying to add a bigger sprite, usually as a background, while changing the frames of the animation (Only on the first time around if looped), the big sprite will cause the game to lag for the duration of the animation. It would be nice if this was fixed and would give a few more ways to go about adding details to game backgrounds.
This sounds like something that would be with your system or your events.
I’ve used sprites up to 2000x2000 before that have 30 frame animations (animated backgrounds) that did not lag when changing frames.
If you’re going above 2000x2000 you’re working outside of the recommendations of the engine (and pretty much any 2D engine, at that).