Textures messed up after "Build"

I have been playing with importing my SketchUp 8 models into UE4 however when I build the lighting in the engine all the textures on the model get messed up in a weird way.

When first I place my model in the world looks like this:

But after I hit the “Build” button it looks like this:

Is this a bug or something I am not doing right?

this is a problem with your lightmaps, you have to create a lightmap for your model before importing into ue4, there is a lot of resources out there on this topic, this has no relatoin to the textures.

but by the way, how did you import your textures into ue4?, what is your method, I’m still looking around with no hope on importing tiled textures for several months (your problem is not related to textures).