Simon Willison’s Weblog

Prompt to Claude Opus 5.5 High:

Build an artifact where you open a photo and it rapidly (in a few seconds) paints a version of that photo using a canvas element and simulated paintbrush

See also my previous experiment getting Claude Fable to simulate a watercolor illustration with P5.js.

Quick Study uses Sobel edge detection, with no external libraries beyond Google Fonts.