What is Inverse Square?
Inverse square is a term used in 3D visualization to describe the relationship between the size of an object and its distance from the viewer. In other words, as an object gets further away from the viewer, it appears smaller.
This effect is most noticeable when looking at objects that are far away, such as stars in the night sky. Due to the inverse square relationship, stars appear to twinkle because they are constantly changing distance relative to the viewer.
The inverse square relationship also applies to light sources in 3D scenes. As a light source moves further away from an object, it becomes less effective at illuminating that object. This is why spotlights are often used in stage lighting – they produce a strong, focused beam of light that can reach a long distance.