By "sprite sheet" I just mean the typical rectangle sprite sheets used in 2D games:



I'd like to import it in COP so it's "time dependent" (in other words, it's animated when you play Houdini's timeline), apply some COP filter and export it as a sprite sheet again.

I guess the import part can be done by transform 2D with $FF? But does it mean the "outside" pixels are still alive and all the filters will apply to the whole sheet, causing performance issues?

And how to export the sheet again?