On: A 'lorem ipsum' for images.

[kingkool68]

How about "Could not compute"

[charliepark → kingkool68]

I think giving a brief explanation is useful. Maybe "Sorry! We can't generate images that large!" or something. That explains what's going on without going too deep on the max dimensions and whatnot.

[derefr → charliepark]

"Our program can't withstand images of that magnitude!"

[c23gooey → kingkool68]

Computer says no