try pre-composing the time-reversed layer with move all attributes, now in the master comp use Twixtor.
Is that the same as rendering it out like an export? I just exported and re-imported so I could continue working until I found the solution. Could you elaborate on what pre-composing does? more specifically, the attributes thing? thanks for the input Roei!
Is that the same as rendering it out like an export?
Almost identical. in your case actually could be a better option because it removes one instance of calculations (the time reverse) you have to deal with and it means faster render. just make sure you exported a lossless version and not a compressed version. Quicktime Animation/PNG is a good option for lossless.
Could you elaborate on what pre-composing does?
essentially it's like putting all the elements of your Composition in a box as if you rendered them and imported them back. only you can access them. it's good for organizing your timeline and sometimes necessary for a certain effect.