This will spook you.
When an artist hits the wall on their piece, the “secret trick” is to turn the work _upside down_ so you “detach” from the “reality” of the object/subject and see ~only~ the shape, shadow, color and form.
Somehow, intuitively, you kicked the “right side of your brain” into overdrive and it rebelled against your left-brained -perception- of whatever you were painting and went into total instinctual mode, instead.
Cool.....:]
The writing version of that is to change the gender of a character.
In a story I worked on recently, I set up a character as the hero's best friend, who would be there thruoghout the story as his conscience. Then a disaster occurs, and another character reports "He's gone." I kept writing, waiting for that character's surprise return, but nope, he was done in.
That sort of thing happens a lot when writing, but in painting it's rare for me.