What's the biggest canvas, paper, or whatnot that you've used when creating a piece of art? I'm working on one now that's 11,000px by 11,000px, which will equate to 3 feet by 3 feet printed out. It's so much harder working with such a large space because all of your techniques and normal workflow habits don't quite work the same anymore. For example, what would normally be a single stroke on a smaller scale is now 7 or 8 strokes to get the same line drawn. (I'm doing a large portrait, not a bunch of smaller things on a large canvas.) I guess 3 feet by 3 feet is the largest canvas I've worked with.