Campfire flames and smoke rise in a dark pine forest
870 views · 17 likes · 9 saves · 2 reposts · Posted Sep 26, 2026 · 0:38 · Art
OUR NOTEA 38-second film of a GPU fluid-simulated campfire in a night forest, with blackbody-colored flames, rising smoke and scripted camera moves; the author says it is one HTML file rendered offline, with sound driven by the fire itself.
I asked opus 5.5 in @agnt_gg for the most realistic fire it could build using ONLY javascript.
It wrote a real 3D fluid simulation that runs on the GPU. The flame colors come from blackbody physics, the smoke is real volume, it runs at 96 fps in 1080p, and it critiqued its own renders about 40 times.
Then it shot a 38 second film of it. The sound comes from the fire itself. 🔥
Details:
- Nothing faked. The fire is actual simulated gas that burns, heats up, rises, and swirls. It gives off soot that glows, and the soot that escapes cools into smoke. Every frame is computed on the GPU.
- The AI graded its own work: render a frame, have a vision model pick it apart like a VFX supervisor, fix it, repeat. It caught a flame that kept dying, ring shaped artifacts on the ground, and coals that looked like cheese chips.
- The film isn't screen recorded. Each frame is rendered offline with scripted camera moves. The crackle and roar come from how brightly the fire burns in each frame.
- No Blender, no stock footage, no sound library. One HTML file, one conversation.THE PROMPT
Partial prompt — the creator shared only part of it.
I asked opus 5.5 in @agnt_gg for the most realistic fire it could build using ONLY javascript.
It wrote a real 3D fluid simulation that runs on the GPU. The flame colors come from blackbody physics, the smoke is real volume, it runs at 96 fps in 1080p, and it critiqued its own renders about 40 times.
Then it shot a 38 second film of it. The sound comes from the fire itself. 🔥
Details:
- Nothing faked. The fire is actual simulated gas that burns, heats up, rises, and swirls. It gives off soot that glows, and the soot that escapes cools into smoke. Every frame is computed on the GPU.
- The AI graded its own work: render a frame, have a vision model pick it apart like a VFX supervisor, fix it, repeat. It caught a flame that kept dying, ring shaped artifacts on the ground, and coals that looked like cheese chips.
- The film isn't screen recorded. Each frame is rendered offline with scripted camera moves. The crackle and roar come from how brightly the fire burns in each frame.
- No Blender, no stock footage, no sound library. One HTML file, one conversation.MAKE ONE LIKE THIS
Three steps, using what the creators in this index used.- 1 · Copy the prompt
Use the prompt above as your starting point, then change the subject and the style.
HOW OTHERS WROTE THEIRS → - 2 · Direct it like an editor
- Ask for one self-contained HTML file on a fixed 1920×1080 stage.
- Link this video as the reference for pacing and style.
- Send two or three rounds of specific notes.
- 3 · Render it to MP4
A short piece like this can be screen-recorded, or captured frame by frame for exact timing.
TURN AN HTML ANIMATION INTO AN MP4 →
The creator didn't name their tools. Most videos like this are HTML, canvas or SVG animation written by Claude and screen-recorded or rendered to MP4 — how that works.
realistic game cutscene trailer 100% from code: a burning ship a survivor in the water, particle fire, lightning a rogue wave. every frame is a function of time, motion blurred, and piped from a headless browser into ffmpeg. score synthesized in python. 73s to render. 🎬
Indexed Sep 30, 2026, 2:01 PM · Views as of indexing. Video and post © their creator.