I've been working on a AE animation project with low res photoshop layers but now want to swap them out for the higher res ones. I need to make the video larger so I need to do so without losing quality.
I've tried replacing each layer with the new photoshop layer but the coordinates and masking are all wrong. Is there an easier way to change all the source files of the layers (essentially just raising the scale of the entire project without images pixelating)?
You should also look at http;//aescripts.com. There are a couple of comp resizers there that help automate resizing nested comps. You may need to go through the comp and use the null/parent/scale trick in my previous reply to get it to work.
If you start out using proxies then the problem of replacing footage with higher resolution layers is a lot easier.
I'm still learning AE so i had a bit of trouble with the pairing of the nulls to the layers, but luckily the upscale needed wasn't too drastic, so i was able to get it done using the detail-preserving upscale efefct.