Just out of curiousity, why are you using Marmoset over something like UE4? I would think that for a modular environment, an actual engine would be a much better option.
Thank you very much! (: It's much better than the vehicle asset I made before it, but I still have a long way to go. Hoping to get the hang of PBR and UE4 for my following assets. This is the concept art I worked from And here's the modular list