GoodMusician said:
so if you simply take the trunk and the rest of the tree below obi-wan. and put it infont instead of behind him, it would fix itr.
Right. But Yoda looks right at Obi-Wan when he first appears next to him. And why would Obi-Wan stand so far away from Luke and Yoda. Of course, the other question is why did he shrink himself if he wanted to be intimidating to Luke?
EDIT:
Here's the shot. I guess Yoda could be looking way behind him if we wanted him to. Also, Obi-Wan is floating. Very weird.