This is my minecraft 1.21.1 Neoforge wizardry mod. Dont change anything inside that mod itself, I only gave it so you read through it, so you know what it is about. Please create a pure javascript animation based on it (to basically create a trailer). Entire trailer should be as high of a production value as possible. Please spend your time on this, its very important. Use high quality text-to-speech model for generation. You can use any tools you can find access to and resources on the internet. You create the script, the assets, the animation, everything. Work autonomously until done. Quality is paramount. Production value should be on professional level.
Make it yours. Replace the first two sentences, about "my minecraft 1.21.1 Neoforge wizardry mod", with a line about your own project, and keep the rest, from "Please create a pure javascript animation" to "Production value should be on professional level.", as the brief.
Trailer for a Minecraft wizardry mod
A 38-second cinematic trailer for the creator's Minecraft wizardry mod, with voxel scenes, spell effects, narration, and music. Claude Code read the mod and made it from one prompt in about 2 hours: three.js scenes, local TTS voices, and code-made sound.
“I only used 1 prompt, nothing more.”
You'll need
- Your own project's files in the working folder for Claude to read
- Usage headroom: the run used a full 5-hour window on a Pro plan
How it was made
Run at the Extra effort setting with the mod's files in the folder. As relayed by the creator from Claude: Python copied textures, sounds, and text out of the mod and the vanilla jar; each shot is a JavaScript module on a small three.js engine (voxel mesher, players and mobs from their skins, GPU particles, spline cameras); a post shader adds tone mapping, grade, grain, and letterbox; music and most effects were synthesized with NumPy and SciPy and mixed with the mod's own sounds; Kokoro made a reference voice and Chatterbox spoke the lines, with takes picked by Whisper large-v3, UTMOS, and pitch analysis. The pipeline can export an MP4 through Playwright and FFmpeg, but the posted clip is a screen recording of the HTML file playing in Chrome.
One full 5-hour usage window on a €20-a-month Claude Pro plan; no API spend
Posted Sep 26, 2026 · r/ClaudeAI on Reddit · 668 upvotes · 113 comments
Prompt from: Comment by the creator (the same prompt is in three of their comments)
Look notesby Reference
A dark fantasy trailer in Minecraft's blocky world: a spellbook on a lectern, a robed wizard by a brazier, an underwater spell, and named spell combinations, ending on a gold title ringed by elemental sigils.
- Color
- Firelight orange and ember red, deep night blue, underwater teal, frosty white, and a starry violet for the title, with soft bloom on every light.
- Type
- Small spaced caps with element icons for spell names (WIND, WIND × FIRE over FIRE PHOENIX, WIND × ICE over RIME CHOIR), and a gold serif wordmark, TREE'S WIZARDRY, over the tagline SEVEN ELEMENTS · THIRTY COMBINATIONS · ONE FOLIO.
- Framing
- Wide letterboxed shots with shallow depth and heavy vignettes inside black borders, spell labels set small at lower left, and the closing title centered in a ring of seven glowing sigils.
- Sound
- Narration from local TTS models (a Kokoro reference voice spoken by Chatterbox), plus music and most effects synthesized in Python and mixed with the mod's own sounds, according to the creator.
- Structure
- The open spellbook, the wizard at a brazier in an autumn wood, a figure in a misty night forest, an underwater spell among kelp, the WIND sigil, the FIRE PHOENIX combination, the RIME CHOIR combination in the snow, then the TREE'S WIZARDRY title and its tagline.
