Opus 5.5 builds a 3D forest demo in four Claude Code sessions
The author used four Claude Code sessions on Opus 5.5 to build an interactive 3D forest scene with swimming, fish chasing and a rainbow in under 5 hours for $41 in API costs, then doubled the frame rate.
You can now throw fireflies at mushrooms. ✨🍄 The demo is live: https://boring-forest.vercel.app Jump into the water, splash around, chase fish, and admire the rainbow by the waterfall. 🌈🐟 Performance pass: • 4 Claude Code sessions on Opus 5.5 • Under 5 hours • $41 at API pricing • 28% less GPU time by the waterfall • 26% less deep in the forest • 2× FPS on a MacBook Retina display — 24 → 49 FPS Best find: 5.6M grass triangles per frame, with 95% completely off-screen. 💀 Next: how Claude built its own GPU profiler and learned to measure the frame itself. This is getting wild. 🔥
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