Thin Film VEX node

Simulates the effect of light reflecting on surfaces with a thin-film coating, such…

See also: Bump Noise, Glass, Rainbow, Reflective

This operator simulates the effect of light reflecting on surfaces with a thin-film coating, such as soap bubbles or sun glasses.

For a more complete model that also computes the Fresnel reflection and refraction contributions, see the Glass operator.

Alpha Para determines the alpha value of the geometry that faces the camera. “Para” stands for “parallel”, which describes roughly how the Surface Normal (N) and the direction from eye to surface are relative to each other when the geometry faces the camera.

Alpha Perp determines the alpha value of the geometry silhouette, where the Surface Normal (N) is roughly perpendicular to the direction from eye to surface – hence Alpha “Perp”. The higher its value, the glassier the surface.

If the Position (P) input and the Normal (N) input are not connected, the global variables by the same names will be used instead. Typically you will use Rest Position or UV Space Change as inputs for “P”, and will not touch “N” unless you want to apply additional displacement to the this surface using an operator such as Bump Noise. If you need to access the global variables directly, they are available from the Global Variables operator.