LOL, that's nothing, the old workaround involved something like 8 very complicated steps (speaking from YouTube videos I've watched). One of the steps was to make the painting as a regular cc item, hang it on the outside of a building, put your sim on the lot next door on a platform at a certain height in a certain spot, then paint by reference. Plus you had to change things in your origin settings to legacy, and just all sorts of craziness. Thats just the part I happen to remember.
Its such a cool feature, I just wish it could be easier somehow. I just want to upload some baby potato pics, lol. I think they are neat because everyones potato looks the same, so anyone can use them as their own baby potato pic, lol. I'll post some images, they can be found on my gallery page (as cc).