Maya Buildings wont appear in unreal?

Everytime I import a maya building into Unreal 4.9, depending on how the camera is angeled the mesh looks see through. The faces are all pointing the same way. What should I do? Here are links to pictures of what it looks like.

Problem Pic 1
Problem Pic 2

Hi!

UE4 default visualize all geometry in a Single Side mode. If your model has thickness one polygon , then you need enable Double Side mode in your shader. If you planned create DOOM like game with corridors and rooms, then in MAYA you need reverse normals of your models.