First off, I've searched for a long time for this and have found nothing like the problem I'm experiencing.
I've imported a .obj model like I have many times before, but for some reason some of the faces are missing - there are holes in my model. In Sketchup the model looks perfect but something is happening between the exporting, importing, and rendering of the model.
Is this a problem with Terragen or just with my model? It looks as if I'm missing a texture from all those faces, but I've checked the shader/textures and everything looks good.
I've attached some images of the problem. As you can see, the parts where you can see the planet through the ship are the problem areas.
Any help would be greatly appreciated.