But zombie84 has a good point: the hologram is too brightly lit and shows too much. It takes away the air of mystery and makes it less scary.
Perhaps what the Emperor needs is to have the hologram considerably darkened AND the remaining facial features made to look more like return of the jedi?
When it comes to oscuring him, something like this is what I had in mind:
http://www.skywlkr.net/idc/expansions/downloads/wotc/card%20images/emperor%20palpatine%20d.jpg
What do you think?