It’s not for a tee, it’s just a short-living contest that will last for a special event on july 1st. No print will be made, so no technical restriction (ie, it doesn’t have to be vectors), except for the size (800×800px max), the format (.jpg), and the weight (less than 5Mo, which isn’t hard to do, since jpg compresses enough).

There will be a gallery opened to votes during the evening (July 1st, while the event takes place). At the event, people will vote too, and at the end of the evening a jury will announce the winners.