Just watched this the other day.
More on outsider artists:
Marwencol, about a guy who suffers permanent mental and physical damage after a beating one night coming out of the bar, and goes on to create an entire WWII village, with mythology, as self therapy (he’s uninsured). Sounds weird, but it’s one of the best movies I’ve seen this year, and I watched it three times before finally writing an essay on it.
In a Dream, about a mosaic artist here in Philly, by his son.
In the Realms of the Unreal, about an outsider artist who died in 1974; more about his work than his life.