I worked in the Marketing Department at SAS Shoes, but somehow our product engineers figured out that I could make VERY accurate scale drawings in Illustrator. They started giving me little art projects where I had to match their exact specifications, from the tread size and patterns to the exact curves and grooves. I worked on several sole designs, providing iterations of tread patterns that they could test with prototypes. These were actually used in production! I got lots of little projects, like producing artwork for this purse medallion: