Ok, I am trying to understand what you are saying :
If I make the blackboard at 720X540 roughly, when I zoom into it from afar, it looks pixellated and not sharp – not what I want. So I made it a bit smaller at 2500 X 1750. I am hoping that speeds things up. I am not really that knowledgeable when it comes to AE, so I might be missing some easy steps.
Now, should I precomp the photos? There is a stack of them and they flip from pic to pic – will precomping the set of photo’s speed things up?
I am not sure what you mean by hide the changing of the blackboard comp…