The key components for the tunnels around Ceti base are ready for textures and lights. The essential elements assembled are a blast door, a tunnel, a straight intersection, and a T intersection. I might be able to build the focus corridor with these. Although creating an X-intersection will only take me an hour or two to build, it is more a question of whether such a section can be mimicked with camera-work and the T-section..
Because of the number of models involved I am thinking of creating a system where at a far enough distance, the leather panels and the pipes along the bottom are replaced with panels that mimic their look. The same would be the case for the flourescent lights in order to save complexity during renders.
I feel I can sign these models off for now, and will come back to these for textures, normals and so on at a later date.
The models are kept symmetrical by mirroring. I create one quarter of the section and then mirror the geometry, then I mirror the UV maps and sew contiguous sections together so that just because the geometry is mirrored does not mean what's on the surfaces has to be. This is also the case with putting UV shells on top of each other. I'm moving away from this to experiment with more varied appearances.
For easy importing and instancing, each segment has been given its own scene file under a special asset folder..