SP all i play is Cod4 ! - I dont play video games but bought the xbox just to play it
Yer i add some reflection to everything because most things do reflect some light.
What i do is edit the transparent windows in SU so that they are at 100% Then i rename it which makes it easier to find in Kerk. I Give it a name like W80T70R1 (Window - 80% transparency - 70% reflect - no.1 ) So i know what to do with it in Kerk.
You can't accurately edit transparency in Kerk so i will just add the thin glass material and change its colour(Deeper colour = less trans. ).
I'll have a new PC soon so the renders will be better. Some materials get lost in the export to Kerk atm.