Real-time physically correct fire sim with 6.1M cells built by Opus 5.5, even sound is synthesized
mark_k · x · 2026-10-26
- Developer LexnLin built a realistic fire simulation with Claude Opus 5.5: a real 3D combustion sim running 6.1 million cells.
- Flame colors come from blackbody physics, with sparks and embers included — no assets and no sound files were used.
- The fire audio is synthesized in real time, making it a physically correct real-time rendering rather than AI-generated video. markk calls it the most impressive 3D rendering he's seen in a long time.
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