Here's an old art test I've worked on for a week.
The objective was to create the interior of a bank for a FPS game, without any textures, grayscale only
It's pretty rough for now and still needs a lot of work, I'm not happy with everything, specially with the lighting, but i'm quite proud of the the general shape.
I was mostly inspired by the architecture of the Natural Museum of London, the Bank of England and by a bank environment from Jonjo Hemmens.