NEW IN R20
Thin FilmPreview Basic Inputs Outputs Context
When light refracts in a very thin layer of oil, soap, etc, it bounces around and light interference starts playing a role. Since light consists of multiple wavelengths, some wavelengths cancel each other out (destructive interference) and / or boost each other (constructive
interference). Depending on the thickness, index of refraction and viewing angle, the characteristic colors of this effect will appear.