Amir Mushich releases an open-source Blender template for coding agents

• Shred-kit turns a custom poster into a Blender paper-shred reel; AmirMushich released it as a free template.
• Claude Code, Codex or Cursor can guide setup and customisation through chat, following the launch instructions.
• A final render took roughly 75 minutes on a laptop RTX 4070 in the creator's test, with much faster previews.

The agent playbook gives the headline a 3-7-character target and warns about descenders in oversized type. The smartest constraint sits in the README: motion, camera, timing and editing stay fixed while the poster changes.

Amir Mushich's shred-kit makes an eight-second, 9:16 animation: a printed poster gets torn into strips, fed through a shredder and rebuilt into a seamless loop. The finished format is 1080×1920 at 60 fps.

Production runs through four scripts listed in the project documentation:

• poster.py draws the poster.
• shred.py builds and animates the Blender scene, including paper geometry, fibre and translucency shaders, and shredder cutter discs.
• edit.py cuts the shots and adds grading, glow, grain and punches.
• sound.py builds audio from the render's timings, keeping it synchronised when the text changes.

Mushich names Claude Code, Codex and Cursor as starting points, with a prompt to clone the repository, read it and help make a new version.

Before collecting the brief, the agent checks dependencies specified in the environment playbook:

• Python 3.10 or newer.
• Blender 5.x, tested with 5.2.
• ffmpeg.
• An available GPU backend, with CPU rendering as a slower fallback.

The playbook requires permission before system-wide installations. A missing Python installation pauses the workflow until the user installs it.

The agent asks one question at a time and records the user's choices in brief.json, according to the briefing playbook.

• Words: seven fields covering two corner labels, the headline, subline, cropped giant lettering, footer and body copy.
• Fonts: separate display and body families, downloaded from Google Fonts or supplied as .ttf or .otf files.
• Colours: paper, ink and one accent colour, with an option to remove the accent band.
• Picture: a supplied image converted into halftone dots.
• Sound: a designed track of ripping, falling paper, shredder noise and clicks, mixed to −14 LUFS, or silence.

After each text or colour answer, the agent validates the brief. The specified contrast thresholds are 4.5:1 for ink against paper and 2:1 for the headline against its accent band.

Mushich reports a poster preview in seconds and four 3D stills in about a minute. His final render took roughly 75 minutes on a laptop RTX 4070.

The agent's render playbook specifies the remaining steps and revision costs:

• Estimate first: time real frames for 2-5 minutes, report the projected duration and get approval before the long render.
• Draft option: half resolution and roughly a quarter of the final render time.
• Visual revisions: text or colour changes require a full re-render because the poster appears in every shot.
• Audio toggle: switching sound on or off only requires re-muxing.

Deliverables land in out/. The social-export option adds 16 Mbit/s encodes and two cover stills alongside the 60 and 30 fps video versions; audio also comes as a WAV with a frame-exact cue sheet.

Mushich separates the rights in the licence section:

• Code: GPL-3.0.
• Included sound recordings: public domain.
• Demo picture: the author's own render, free to use in videos made with the kit.
• Finished videos: the user's to use, including commercially.