[ART] Invisible model + Poly reduction

[ClayPigeon]

are textures assigned to the entire model and are they in the amnesia folder, what format are they?
is it one combined mesh or seperated per texture?
did you check if all faces are facing the right way?, backface culling makes faces invisible from the backside

There are 3 textures assigned to one mesh.
And they are in the mod folder, 2 of them (outside and inside) are .dds and the windows are .tga.
And how can I check if the faces are facing the right way?

Oh and also, I'd really like it if you can help me with the poly count problem:

Also, you can notice that the polygon count is EXTREMELY high (around 5.5k), but whenever I reduce it, the model gets twisted. How can I reduce the poly count without getting the model screwed?