Hello there.
Andy Dolph suggested me this discussion group to keep in touch with people whose producing fulldome content with Blender. Although I'm not directly involved with planetariums (I love them though) I recently worked with fulldome development for the BGE and now I'm trying to explore offline rendering possibilities.
I came out with a method at composite time that can handle alpha and doesn't require raytracing.
Basically I'm using linked scenes + unique rotated cameras + UV Map (composite nodes).
Now I'm disliking the few seams I see even with this method. It'll work for preview but not for the final images.
Does anyone suggest another app to stitch the "cubemap" images into a fulldome one?