[Kevin Camin] “I think there is a bug in C4D. You need to align your planes to a +Z orientation in the parameter settings. Then you can rotate them into whatever orientation you need. This should fix everything.”
It’s been a while since I’ve used the External Compositing tag, but I believe Kevin is right.
Essentially AE will only see the Axis data of the object that you’ve applied the External Compositing tag to. Since solids in After Effects always face down their Z-axis Kevin’s suggestion for using a Z+ orientation will work for primitive planes.
If you’re working with a polygon object you’ll want to rotate the Axis (Enable Axis modification, then use the rotate tool) to match the orientation that After Effects will force on the imported solid/null.
As a fix for your current setup in After Effecs you can duplicate the solids that AE imported, parent the duplicates to the original imports, remove all keyframes from the duplicates and then rotate them 90° on either the X or Y axis (the axis you need to rotate on may vary). Hopefully that will work 🙂
Darby Edelen