How the rainbow swirl cutting works
A spiral cross-section is painted once into a texture, wrapped on a glossy loaf, and each slice falls onto a walnut board. Blade speed drives the synthesized shear sound.
Last updated: October 28, 2026. Runs in your browser with no downloads.
Rainbow swirl cutting FAQ
How do I slice the loaf?
Drag down on the stage to push the blade through at your own pace, or tap the stage or Cut Slice for an automatic cut. Drag sideways with the blade raised to orbit.
Is the cutting sound real?
It is synthesized live with the Web Audio API. Blade speed shapes the wet shear, with separate sounds for blade contact, board tap and jelly settle.
Does it work on phones?
Yes. There are no heavy shadows or transparency effects, and it only renders while something moves, which keeps it smooth and saves battery.