Hi all,
Yep I agree with the triangles as I have been having the same trouble, but I am not convinced that it is what it looks like. It has to do with the renderer. Now I tried to bring this model into TG2, but there were over 38 mesh parts to the model and even though I split in into 3 parts with the .mtl file is still did not see many of the meshes and I think there is an over all limit with these kinds of models to only 32 or so then it just craps out on us, but I could be wrong, and wish I could be on the beta team just for this section of the TG2 App.
This is what it looks like in Vue as a quicky Shot just to show it works in every app from Max, XSI, Vue, Poser, Bryce, Daz, and just about every other App I work with but TG2, sad to say


As you can see it looks just fine. The I went back into it with build 3 and rendered out the same file and got these.

Now as you can see not all the Stones are getting mapped, even though I have all the .mtl files in place right, so there does seem to be an upper limit to how many Meshes you can get into this app at this time. These are Triangle mesh as you said and may have allot to do with it.
With build 4, which by the way they said they fixed the bug rendering problem, I got this after I rendered it again in the latest build and I still get all kinds of Anomalies, and no way to flip normals like you would normally do, so WTF Watson? So I rendered this out at 1 full render.

Now color me stupid, but that seams like they got it worse then better. So here lies a very dead temple and no idea when we can get fixes on all this stuff.
Oh by the way, very cool buildings and I think you can put a transparency Shader on it for the windows to get them so you can see through and maybe a reflection shader to get it to look like glass, but your right, I am pretty sure this is all on Planet Side. At least that is the way it is looking to me right now.
PS: It also messes up the rest of the render as well as you can see the Black areas where for some reason it decided to not to render there???Der?

??
DT