The stairs are a little bit inside the wall, which is a curve,
so it won't be possible to perfectly align them ...
Some of them even change color from black to normal when
moving up or down the stairs. Scary!
Anybody got any clue how to get rid of this problem?
Also, please note the strange vertex lit poly at the top left ...


Example 2:
Stairs (top left) totally black ...
Artifacts on the left side of the door...
Artifacts on the floor ...


Artifacts around the water ...
Is it possible to get rid of them without loosing the lightmap
on the water surface?
And for the green lights on the ground around the water,
the water is light emitting ... Is there a way to get rid of these?

I don't really know how to fix these bugs ...
Any help is much appreciated!