I'd wager the required Chip Memory size for even a 1 bitplane screen
might also be a 'small' problem, given you can't actually fit more than 4096x4096 pixels in it to begin with -
if you have one of them new-fangled AGA machines, or a fully expanded ECS one.
Then again, perhaps you could use the Copper to reuse chip memory by rapidly shifting pointers around and fill in the required bits in memory with new data as you go along... So yeah, WHERE IS IT!?
We need it!