Open for Voting
3D track export/import.
I work in blender. I've basically abandoned AE for anything but color and some moderate masking in post. Tracking can't be taken out of AE, or imported, and that leaves AE's once-great-now-subpar tracking toolset orphaned by an overly strict environment. As a 1st step in VFX that needs to be there till the end, it just can't fit in a workflow that is not 100% AE.
