The experiment simulates our perspective view to the sun. Bacause of it’s size and distance from earth, our visual perspective doesn’t change no matter where we are. The sphere we perceive remains the same size compared to other objects in our surrounding. What’s close to us relatively quickly changes in it’s optical size. The more far away an object is, the less the optical size changes. This illusion simulates the sun’s sphere with it’s steady optical size and location. The experiment uses direct sunlight and has no programmed lights, it’s fully working on the changing perspective of the camera.