Never seen anything quite like this! The high contrast nature of the photographic elements (I asssume that the figures and the furniture were photos) combine with the sketched environment in an interesting way to create a pleasing, rather dreamlike whole. Can you add color with this process? I suspect that rainbow highlights (or perhaps off-kilter skin tones) could make for a genuinely trippy experience, if you wanted one. Not recommending, necessarily, only speed-balling. Anyway, you're certainly onto something here... a genuinely arresting image!