Coloured pencils have been utilised here as a device for rendering. The colour not only developed the perspective of the sketch, but establishes context and mode through colour and tone. The technique used here is light shading and blending.
It seems that the formation of the buildings and the hardscape were created in MAX. The plants, kite and the person were photoshoped in. The isometric diagram was made in first in autocad and then touched up in illustrator.