The Postsparkasse/Postal Savings Bank by Otto Wagner:
It's very difficult to describe a general lightingsituation in the "kassa"room, so you will get very different results.. look at the photographys and you will see the same "problem" for the photographers too. ;)
maybe i should point you to the two possible lightsituations:
1. Clear Sky AND direct sunlight:
Photos by Margherita Spiluttini
I would say this is the goal for those who really want to simulate. You can see that the glass is not 100% opaque.
2. Clouded Sky or no direct sunlight:
This is the most interresting situation since this is the more common situation.