The way illusions work Is your brain can't make out something do to let's say the lighting in a room so it try's to solve it but gets it wrong u should the the illusion that has the same color grey in different lighting so it looks different
This model was simple to recognize . the shadow of the small balls was on the left side of the roof but the right side of the roof was not glowing! . It was simple when I saw the whole video! hahaha lol