Hi Craig,
Sad to hear this. 1.5 gigs?! That’s crazy.
We have done some optimisation that comes out in Alpha 3 which will help. But in general Animation Paper is not made to do an extensive amount of lasso/stamping. We have important data being copied with the lasso and these data will multiply and become crazy 🙂 if you keep copying extensively. The data is giving you big advantages like scaling drawings without any loss/degradation/blurring, better coloring, etc.