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Card 722 of 9802026-09-27 issue

Observed arrival · 2026-09-27

Rainbow Simulator: a browser playground for light

rainbowsimulator.app Visit website
Editorial interest 84/100 Selection signal · not a rating of the site

An interactive tool for changing simulated sunlight and raindrops, exploring rainbow effects, and placing a rainbow over a camera view.

Landing page captured for the 2026-09-27 issue.
For
People exploring rainbow optics and atmospheric light
Worth noticing
Its camera overlay is manually placed; the page says it cannot detect the Sun, trees, buildings, or surroundings.

Field notes

The controls expose more than a generic rainbow effect: users can vary droplet size and size variation, with the page linking similar-sized drops to visible extra bands. Its model description names water dispersion, Fresnel reflection, and softening from the Sun’s apparent disk. Camera placement is manual, and the page says rain amount changes brightness rather than representing a measured rain rate.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use

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Nostalgia for an Imaginary Console

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rainbowsimulator.app

Landing page observed 2026-09-27. The live site may have changed.