Importing Problem

I made a simple house in cinema 4d and exported it into Fbx,Obj,3ds, and C4d format but every file causes this weird graphic issue. On one side the house has a invisible wall but on the other side that exact wall is fine. Also some parts of the house seem to have completely disappear.

Check your normals. Faces can only be one-sided unless you are using a special shader, but in most 3d modelling packages by default they show both sides of faces.

The fact that the problem is consistent over all different export/import formats suggests that the problem is in fact with your Cinema 4d file in the first place. I’m not very familiar with the package myself, but google for face normals in Cinema4d and see if you can fix them.