Hi everyone,
I’m new here so I hope not to make a fool of myself.
I’m working on an exploration/puzzle game prototype, which is more of a learning exercise for me.
I’m going for a abstracted, stylized art direction. I’m heavily using post processing effects so far as I want my whole world to be in a blue-ish tint.
However, I’d like to have some elements rendered in black in white, so pretty much a selective desaturate of some elements (keep in mind I’m using colored volumetric fog, etc).
Do you have any idea how to achieve that? Please keep in mind my newbish skills 
Much appreciated!
Not sure if such a good example but the way elements are highlighted in Deus Ex could be a starting point… http://www.creativeobserver.com/img/7943_eidos_deus_ex_3_scaleform_fbx_middleware_screenshot_lg.jpg
