Observed arrival · 2026-09-27
Rainbow Simulator: a browser playground for light
An interactive tool for changing simulated sunlight and raindrops, exploring rainbow effects, and placing a rainbow over a camera view.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- 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
One card from the complete issue