Number of Bounces creates accumulating brightness. IL with glowing boxes at 1.0 ambient, no other difference except bounces of 1,3 and 6, the more bounces, the brighter.

As Miss Nancy said above, one can turn up the ambient beyond 1.0, and if this lets me "get away with" fewer bounces and thus quicker render time, that will be a good thing.

That is, if fewer bounces does not degrade the beauty of the final illusion significantly. I don't want to be "not using enough bounces just so I can say it is GI".

::::: Opera :::::