Import any mesh/assets 3d objects from one UE project to another:
R click on the Mesh in the project → Asset Action → Migrate → Ok →
place in target UE project’s Content folder → Select Folder
To copy the animation of the Mesh: R click on Animation folder in Content Broswer → Ok →
Same folder as the Mesh → Yes All (overwrite)
Export the mesh from UE to AE:
Open the target UE project → create new seqeunce, + Track for the Mesh, and place a new cine actor camera
→ In Sequencer, R click on camera → Import → assign camera track fbx exported from maya
→ For the Mesh, unfold its menu → Animation → assign the imported Animation
Turn off (or eve delete ) Sky Sphere → and adjust Light Source direction fitting the compositing BG
Edit > Project Settings > Engine > Rendering > Postprocessing > Enable alpha channel support in post processing (experimental) > Linear color space only
Move Render Queue → click on png sequence, should show Output alpha option? (nothing show for me)