Here is a quick pencil sketch I jotted out on graph paper. I ran the image through a filter after I scanned it to give it a "blueprint" look.
So I brought out Maya to create the geometry. I realized I was a little rusty and had pull down the reference and utilize the online docs.
After exporting to OBJ, I pulled it into the engine. I had to scale the geometry and turn on two-sided lighting. I also changed the field of view and tweaked the movement speeds.
I'll finish up this test level and maybe do some texture work.