I participated in another round of the Multi-Artist eXchange, or MAX- [link]
It's basically a monthly art exchange with an optional theme. You draw something for someone using their characters, and someone else draws something for you with your characters. Although this is only third one I've done, it's been going on for over eleven years (with several of the current contributors doing it for all or much of that time).
This month's (optional) theme was "crossover romance", meaning you could pair one of your characters with a character from the other person. The page with all the entries for this round- [link]
I got A Twu- [link] who advocates for these domes in California. Other people seem to draw them, sometimes drawing what a dome would be like for their own character. I didn't know if my technology-related characters would be compatible, so I drew this Jungle Girl (from Pulse) hut, and made it a similar shape.
In return, I received artwork from Reed Hawker- [link] who runs MAX, and is the author of the webcomic Culture Shock- [link] He drew Tabitha in costume- [link]
Anyone can join BTW, there's currently about 12-20 regulars. It's kind of a unique experiences because you don't find out who you have to draw for until the beginning of the month, and then you don't see what the other person drew until the end of the month.