Hands down, one of my favorite illustration mediums is paper...especially if you can LASER CUT your digital illustrations in paper! I spent a lot of time working on various illustrations for different applications. One was a nine-foot rendering of an illustration I made digitally, then had to print out in three different parts and re-create on a wall. The others were for the sake of design research, and playing with the use of light and shadow reflected onto the walls of tiny designed sets.
dirt.
orange bough.