I was afraid you might have other transparencies That needed formal treatment, hence the limitations I mentioned.  I don't know a way around doing it twice and then combining later.

i also don't know of a way to fake the issue with the lighting you're talking about.  It MIT be something that could be managed by the specific scene you're working on.

Can you explain a little more (maybe).  I don't know if I can help but I'd give it a try.

-Kix