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.
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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.
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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.
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I'll finish up this test level and maybe do some texture work.