Check the doorway itself. It can be too small for them.

Looks nice so far! What sort of features are you planning on adding for the final release?

Thanks! Well, I am not planning to add much stuff, because I am working on the other big project. I w...

Here is screenshot. This is happening with any light which is near the wall. It like splitting in half.
Suggestions?
BTW why some of my brushes are using lt.blue color on 2d view?

[img width=770 height=433]http://i...

I got the sound working, but it does not depends on trigger, it is just playing.
And simply connecting them with "W" key is doing nothing. Can anyone provide an example of simple sound, that activates by multiple_trigger (only once).