Hmmm, I haven't yet tested this with all the various formats of 3D models, though I am working to get that accomplished :)
So bare with me a little on time here, especially, since I really only get to work on this stuff over the weekend and this next coming weekend I won't be around, but I'll sure be doing my best to help when ever I can and if I can :)

Is there any particular model you are working with, I have most of the main objects, bought a ton load when DAZ messed up all our accounts in that buyout deal of Hexagon and we all got vouchers to spend on stuff, so I just bought lots of what ever looked good and then there's all those freebies out there too LOL

Anyway, I don't know how many building or wall or plant type Poser objects I have, it probably isn't all that much, since I model most of those sort of things myself in other programs I use, as I mostly just wanted animals the most and people secondly and then what ever else I thought I might like from DAZ LOL

You can email me directly if you want to at md at md-arts.com and I can spend a bit better time sorting this part out with you, but want to keep the good info still posted here so others can get something from it, of course :)

Off hand though, it sort of sounds like some of the polies just need to be flipped, i.e. their normals flipped, which they do have a button there for that, but if it's only happening to certain polies, then you would have to manually flip those, uhg, you wouldn't enjoy that much, I can tell you that right now LOL

Anyway, let me know which object it is, if you can?

I do have that one object, I think it's called, Ruins?
Should I try that or what?

OK, I'll be lurking around for the rest of the evening tonight on and off.
I'm on the west coast, so i'll still be up for quite a while.
San Diego to be more precise :)

................md :)