PSD Files Size, how big is to big

Question

We are creating some scrolls using PSDs and adding motion to them. We have one scroll that is 720X20,016 pixels and it keeps crashing FCP. Our PSD Files that ar 720X10,000 work fine. Any way to get a big scroll (20,000 pixels long) to work?

Answer 1

For the pure research possibilities,
Take your 720x10,000 file that already has text etc and create a series of new files from it in 100 pixel increments using rescale or expand canvas.
You should have files that start at 720x10,100 and go up in 100 pixel increments 10,200/ 10,300 etc
Test them one by one until the system crashes.
Results?
x