Hi, I'm new to the Threadless community and I guess my biggest question (sorry if it's stupid) is about how to actually end up with a submittable design because the submission blurb says to create art in Illustrator or Photoshop. I also read a comment advising someone to trace over their drawing with the pen tool. Does this mean you have to use one of those programs, or can you just do an old-fashioned illustration and scan it in to Photoshop to submit it? Thanks!!