Here's how this will work.

OK I am going to explain how this challenge will work. I will make a call-out thread, where you post challenging someone to a duel. Then you will PM them and if they so choose, they can accept your challenge. Once you are both agreed on what to terrain, you will create a thread titled: "Person A vs Person B" and you will post any and all shots you create for that challenge there. Shots can include WIP's, tests, final shots, etc.

If you have any questions or concerns about the process of challenging someone, post here and ask.