Actually, the platform colour reminds me of artificially stained concrete. The soil around here, coastal BC Canada, is grey, black or dark brown. I guess its all relative; the soil around PEI, Canada is almost red.
As for realism of the roof supports in a futuristic station, I'm all for leaving them out, but that's just me. Having said that, obstructions near (0-3m) the edge of the platform would not be a good thing.
Nice progress!
I only wish Aspyr had included the tools for us mac users to be as creative.
Rabbyt.