Plug-in scripts for max and gMax to create arches including an arch door and transept object. Both Gothic and Roman arches are provided.
Here are some examples of arch objects with textures and rendered with 3d studio max.
Transepts are the crossing points of the arches that makeup the roof of a cathedral. The transept plug-in allows building cathedrals as well as other corridors and hallways.
Arch Door Rollout
Arch Transept Rollout
The plug-ins provide planar mapping coords, although you are likely to want to use a mapping modifier to provide customized mapping. Submaterial ids are assigned to the various parts of the objects, as you can see from the examples.
All of the scripts are available on Turbosquid.