Simon Willison’s Weblog

So you think you know box shadows? (via) David Gerrells dives deep into CSS box shadows. How deep? Implementing a full ray tracer with them deep.

Posted 21st July 2024 at 4:23 pm

Recent articles

Qwen3-4B-Thinking: "This is art - pelicans don't ride bikes!" - 10th August 2025
My Lethal Trifecta talk at the Bay Area AI Security Meetup - 9th August 2025
The surprise deprecation of GPT-4o for ChatGPT consumers - 8th August 2025

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