Yeah, he didn't call the color effect fresnel. He called the reflections fresnel. You're right that the color effect is called iridescence. https://en.wikipedi

Yeah, he didn't call the color effect fresnel. He called the reflections fresnel. You're right that the color effect is called iridescence. https://en.wikipedia.org/wiki/Fresnel_equations https://en.wikipedia.org/wiki/Fresnel_equations https://en.wikipedia.org/wiki/Fresnel_lens https://en.wikipedia.org/wiki/Fresnel_lens