Well, I can’t get any screenshots, because the game crashed, but I found out that placing one end of a wall segment on the actual floor of the building crashes the game. I placed a wall segment surrounding the floor plan, and then placed a pillar on the floor plan, and then the game crashed.
Steps to Reproduce:
Go to building designer.
Make a floor.
Place a wall segment on the floor instead of on the ground.
Game crash and repeat.
Info: Keep in mind that I have Windows 8, so it may be exclusive to that!
Processor: Intel i7 3630-QM
GPU: Nvidia Geforce GT 750M
Version: Alpha 4 Release 99 v0.1.0