Are you tired of being constricted to the measly 800 x 450px size of Art Academy? Are you tired of inspecting the element of Miiverse JUST to get your artwork into your computer? Well, you're in LUCK. There's an app for that!
1. Open Art Academy on Miiverse.
2. Open your artwork, as if you were gonna paint it some more.
3. Open the Wii U menu, and go into the browser.
4. Open your email and send yo'self a file attachment! You can attach what's on the screen at the moment, which will be Art Academy's artwork. A nice 1240 x 700 jpeg file will be sent to your email!
5. Be happy.
Props to user Holly for having figured this out in Imgur and