Laszlonagy, thanks very much and sorry I didn't find this thread before.
I'm a bit worried, I have something like 10 000 walls intersecting in different ways, some of them in hotlinks, some with different type of finish (mostly plaster but also stone)..... this is going to be mordor
to make it look properly.
...simple plaster.
Maybe the complex structures should recognize finish layers with additional .....aaaa..... next wish to be published.