I'm puzzled about portal behaviour. Some time ago someone, Radiance I think, mentioned to use portals for my kitchen scene, since there are a lot of windows there...
However, I've tried both, with and without portals in place, but the one with portals seems to darken everything outside. A picture says more than a thousand words, so here's what I mean.
The only lighting is a Sunlight obvious outside:
Note how in the second picture the outside porch and lawn seem to be very, very underexposed, what makes me wonder if I'm missing something important here, or is this expected behaviour when using portals...
Using Win XP prof SP2, blender 2.46, Luxrender 12/08/08 CVS
Greetings from cloudy Amsterdam,