Try searching for 'radiosity', 'true ambience' or 'GI'. There where a lot of posts on that not long ago and there's lots of information in there about realistic lighting techniques. Bryce has it's own special feel and it's sometimes a little hard to get the lighing realistic, but bryce does have a very nice render engine when you get to grips with the lights and textures.

(_/)
(='.'=)
(")(")This is Bunny. Copy and paste bunny into your signature to help him gain world domination.