Single point perspective, the most tricky to the human eye. I did a very large one that hung in the conference room of my office. It was of the front entry porch of a very nice estate home I designed. It was done in such a way that the viewer felt like he was in the middle of the entry porch as it wrapped around him. I had one client that said it made her sort of dizzy, like she was inside the picture.

Multiple point perspectives do not do this because they more realistically "capture" the moment, where as single points "create" a moment the brain is not used to seeing. Trompe l'oeil is almost always single point, or forced, perspective.

1650?
Man! Who knew that a cop was able to travel back in time; and pose - leaning over the railing with his hat on and his sleeves rolled-up - long enough for Fra Andrea to capture him?
(Between the top right-side windows, above the "Africa" detail.)
I have to say, I'd never noticed him before now!

Oh my..... good eye. Another anonymous time traveler.

Well, he certainly earned his money with that one. The only painter we had in my family was Uncle Letsgo, and all he painted were chicken coops. They had flat roofs as I recall.

"They had flat roofs as I recall."

You mean they *looked* flat after he was done. I suspect there was more to Uncle Letsgo than we realize.

Uncle Letsgo did not talk much about his service during WWII. We know that he was away a lot and couldn't write letters.
"I do some tings for Army, dat's all" is the most he would say about it.

Years later I came across some of his things in an old footlocker he had in his attic. There was a folder with a scratchy label almost obscured by time and I could barely make out the words "Chicken Talker". The pages had been torn out, likely burned by him.
One scrap of paper remained and I could read "... one day the wind stopped blowing and all the chickens fell over ..."

....like the cows that were raised on hilly terrain, when they went to the slaughterhouse they all fell over.....