I’ve wondered, how physically correct is Cycles, and set a simple experiment. I’ve built a camera-obscura in blender, very basic type of camera. But it has optics at least. And this modelled optics worked!
The image below is rendered without any tricks or fakes. (I’ve added some freestyle outline to show the camera, because the scene is totally dark). My first real-word camera obscura worked much worse Аnd yes, I had too much free time today.