I've painted character for one of my environments :) Girl in headphones in sci-fi city (2021). Enjoy.
Some rescources i used to develop this one:
Balcony railing: http://www.textures.com/
Floating interface: Z-design Tech brushes set v2: http://z-design.deviantart.com/art/Z-design-Tech-brushes-set-v2-20701749
Also some other hi tech brush sets, that i couldn't track the origin.
Various pictures from google/flickr for buildings and one picture for painting figure (also couldn't find origin).