The M.A.R.T.I. Initiative is a mod for Portal 2 taking place in alternate facility to Aperture Labs during the 1980's, following their attempt to create an AI by the name of M.A.R.T.I.
Style inspired by H. Grunts fan map.
This is basically a concept of the style of offices that will be around and in between BTS / Maintenance areas, as opposed to the mainly white and blue offices around test chambers and that sort of thing.
I like the design, the lighting and the detail. In other words, it looks amazing.