Hi! So my problem is that building lights doesn't work well in UE4.5 and I'm 99% sure that this is not my mistake. After I used Build/Build lighting only nothing changed, everything looks the same like before build. You have screen below. I have tested it on UDK, and it's work very well.
I believe I do everything like I should. Yes, I have created second UV channel with flatten mapping in 3ds max. This is not my first contact with this engine, I spent a lot of time in UE4.0 and as I rembemer there wasn't any problem with lightmass.