The animation studio’s artists are masters at tweaking light and color to trigger deep emotional responses. Coming soon: effects you’ll only see inside your head.
Lighting a computer-rendered Pixar movie isn’t like lighting a film with real actors and real sets. The software Pixar uses creates virtual sets and virtual illumination, just 1s and 0s, constrained only by the physics they’re programmed with. Lights, pixels, action. Real-world cameras and lenses have chromatic aberration, sensitivities or insensitivities to specific wavelengths of light, and ultimately limits to the colors they can sense and convey—their gamut. But at Pixar the virtual cameras can see an infinitude of light and color.
Source: https://www.wired.com/story/how-pixar-uses-hyper-colors-to-hack-your-brain/