Thanks for the suggestion. I will do something about that, I understand why that might needed. A game could have bright outdoor and dark indoors etc. unfortunetely I can't tell when, I am very busy at the moment.
PS: I was able to do it by deleting few lines from your code that was looking like scene.environment. But this is not very good solution, because I would like a normal environment too. Hope you find some time to implement it properly, I am looking for it.