The only solution I have come up with so far is to scale the corona to 0.5. I have created my own lamp shade similar to bulbcovered and if I keep the bounding box from extending through the shade this will work. From viewpoints that you should the corona, it would look a little better if it were larger. But not seeing it from behind the shade is worth it.
It could be that this all has to do with the fact that I am using a voodoo card. Lots of stuff just doesn't look quite right.
