Camera-shy? Then let someone else show up. A blocky 3D character, Minecraft-style, that talks, gestures and stars in your reels. It doesn’t exist: Claude Code builds it with code.
Here’s the free prompt to create yours and the step-by-step to a finished reel.
From idea to a reel with your mascot
Ask Claude Code for your mascot
In an empty folder, with the prompt below.
Give it your topic and style
What it looks like, its colors and what your account is about.
It builds it in 3D
Blocky body, poses, faces and a blocky landscape.
Script and voice
Claude writes the script and ElevenLabs voices it.
It assembles the reel
Remotion renders it vertically, no video editor needed.
What you need
- Claude Code (requires a paid Claude plan).
- Node.js installed (the LTS version).
- An empty folder for the project.
- Optional: a voice tool like ElevenLabs for the audio.
The mascot is made with Remotion (video with code) and @remotion/three, which integrates React Three Fiber (Three.js in React). Remotion is free for individuals and companies of up to 3 people.
The prompt to create your mascot
Open Claude Code inside the empty folder, change what’s in brackets and paste it:
Create a Remotion project with @remotion/three (React Three Fiber) in this folder and build a Minecraft-style (voxel) 3D mascot for my reels.
My mascot: [describe: e.g. a spy with a black hat, trench coat, glowing white eyes; colors #121215 and #b6ff00]
My account’s topic: [e.g. AI made easy]
Requirements:
1. Minecraft proportions: head 8×8×8, torso 8×12×4, arms and legs 4×12×4 (1 px = 1/16 of a block). Each part is a box with a pixelated texture (16×16 canvas, NearestFilter).
2. Joints pivoting at the shoulders, hips and neck. Define poses as data (idle, talk, wave, point up, celebrate, think, embarrassed) and blend between them with a 250 ms crossfade.
3. Mouth: a box on the face whose height depends on the voice amplitude per frame (extract the RMS of voice.mp3 with ffmpeg and store it in an array).
4. Blinking every ~3 s and a slight breathing sway.
5. Blocky landscape scene: grass ground, terraces rising in the background, blocky trees, flowers and square clouds; perspective camera and soft fog.
6. Everything deterministic (no Math.random or useFrame: state comes from the current frame).
7. Make a 5 s vertical 1080×1920 test composition where the mascot waves and celebrates, and render it.What each requirement does
| Requirement | Why it matters |
|---|---|
| Minecraft proportions | The “blocky” style is instantly recognizable |
| 16×16 pixelated texture with NearestFilter | Crisp pixels, no smoothing blur |
| Poses as data | Switch from “wave” to “think” with one line, no hand animation |
| Mouth driven by voice volume | It really looks like it’s talking, synced with the audio |
| Blinking and breathing | Without them it looks like a statue |
| Deterministic | Remotion renders frame by frame; anything random flickers or changes between renders |
Tip
Review the 5-second test before moving on. If the head floats, the arms rotate from the center or the colors aren’t yours, say so now: “the arms have to rotate from the shoulder”, “make the hat wider”. Fixing it on the mascot is much easier than in every reel.
From character to reel
- Your topic and style. Tell Claude what your account is about and the tone: “I explain AI simply, friendly tone, short sentences”.
- The script. Ask for a 20-30 second script with a hook in the first line and one pose per sentence.
- The voice. Generate the audio with ElevenLabs (or your voice tool) and save it as
voice.mp3in the project. - The scenes. “Assemble the reel with this script: for each sentence use the pose that fits best, add big subtitles and change the camera shot every 3-4 seconds.”
- The render. Claude renders it at 1080×1920 and shows it to you. Ask for changes in plain words.
What it doesn’t do
- It isn’t a Minecraft model. It’s a character for video. If you want a mob that works inside the game, check out our guide to making a Minecraft mob with Blockbench.
- It won’t be perfect on the first try. Plan on 2-3 rounds of fixes for the mascot.
- It doesn’t give you unlimited free voice. ElevenLabs and similar tools have free plans with limits; long videos usually need a paid plan.
Note
Want to skip the assembly? Building full reels (script, your voice, subtitles, effects and music) with ready-made styles is what the Blackdark Reels pack does. This guide and the prompt are free and don’t need it.
Checklist
- Claude Code and Node.js installed, empty folder.
- Prompt with your mascot and your colors.
- 5-second test reviewed and fixed.
- 20-30 second script and voice.mp3.
- Reel rendered vertically.
And your mascot comes to life.