Tech
Metamerism
An illuminant metamerism illusion platform — LED fixtures crossfade between spectral distributions that appear identical on reference surfaces but produce dramatic color shifts on other objects.
Color is a lie your brain tells you. What you see as "red" or "blue" isn't a property of the object — it's the result of a complex negotiation between the spectrum of light hitting the object, the object's surface reflectance, and your visual system's interpretation of the reflected light.
Illuminant metamerism exploits this: two different light spectra can produce the exact same perceived color on one surface while creating dramatically different colors on everything else in the room. The walls look identical. The objects transform.
The Shift — Illuminant Metamerism Room
CIE 1931 Chromaticity Diagram
Why This Matters
Metamerism isn't just a lab curiosity. It's why your shirt looks different under office fluorescents than in sunlight. It's why museums obsess over lighting spectral quality. It's why LED fixture manufacturers publish spectral data alongside color temperature.
This project builds the tools to compute, visualize, and physically demonstrate metameric illuminant pairs using precision multi-channel LED fixtures — turning color science theory into a visceral, room-scale experience.
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