I’ve managed to track down the layer that’s causing the issue and turned it off (it was another artist’s comp so I wasn’t sure what its function was, but it doesn’t affect it too much visually).
This comp size is 1500 x 1500 (to be used as a sub element later) so I’m trying now to figure out why that layer is giving me a 30K wide element. I agree that’s ridiculously large.
One question: does AE do math on stuff outside the rendered area (1500 x 1500)? The comp would render at everything other render size than Full image res (that’s the way I figured out the rogue layer). If the comp renders at Half res, does AE not bother calculating outside of the visible area or is it essentially 15K across within the memory of what I’m doing?
And how does 64bit change this equation from CS4 in this circumstance?