I really like Infinity's terrain system, the different combos of movement, visibility and saturation can have really interesting affects on game play, but almost all of it is ignored in the "standard" future-urban setting, and the extra complexity can be frustrating in an already complex game.
To that end, I've started on a set of quick ref cards for terrain, starting out with the "suggested standard" table in the main N3 rulebook.
I began with big cards, index-sized 3" x 5", then realized I could get everything I wanted onto a CCG-card size, which is a lot easier and means you can sleeve them very easily. It's also the size of the official Classified Objectives deck and Capt. Spud's awesome version of same.
Here's the current state of design:
Comments and feedback welcome!