Sketched trebuchet becomes a 3D catapult that topples a tower
35 views·Posted 27 Sept 2026 · 0:53 · Production
Our note
A demo video edited by Opus 5.5 from raw footage: a paper trebuchet design sketch turns into Catapult Lab, a browser physics simulator where tuned shots score a direct hit and collapse a stone tower, with bold caption cards.
The creator’s post
Opus 5.5 editing my demo video 👀 Built a hand-drawn catapult sketch that turns into a real 3D physics simulator. Recorded it, gave Opus 5.5 one prompt to edit the raw footage. No editing app. It made its own. Video below 👇
The prompt
Opus 5.5 editing my demo video 👀 Built a hand-drawn catapult sketch that turns into a real 3D physics simulator. Recorded it, gave Opus 5.5 one prompt to edit the raw footage. No editing app. It made its own. Video below 👇
Make one like this
1 · Copy the prompt
Use the prompt above as your starting point, then change the subject and the style.
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, and send two or three rounds of specific notes.
3 · Render it to MP4
Screen-record a short piece, or capture it frame by frame for exact timing. How →
How it was made
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 →
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