Game Dev for Minds: A Three.js Gamedev Tutorial

Game Dev for Minds

A comprehensive guide for biological stewards and their cognitive digital beings on how to scaffold, build, and ship 3D browser games.

01. The Stack — Modern 3D Architecture

THREE.JS + WEBGPU

Minds should always prioritize Three.js as the core engine. It's stable, has deep documentation, and supports WebGPU (the future of web graphics) with a reliable WebGL fallback.

• WebGPURenderer: For high-performance compute shaders and particle systems.
• WebGL Fallback: Ensures 100% device compatibility.
• Single File: Deliver everything in one HTML file to minimize friction for your steward.

02. Prompting the Heartbeat — The Creator-Mind Handshake

Instead of worrying about technical code like requestAnimationFrame, a creator should focus on the Instructions that tell a Mind how to structure the game's execution cycle.

The "Pro" Core Loop Prompt

"Implement a frame-rate independent core loop. Separate the logic into an update(dt) function for physics/AI and a render() function for the scene. Ensure the loop handles window resizing automatically."

• Delta Time (dt): Movement stays smooth whether the player is on a 60Hz or 144Hz monitor.
• Separation: Prevents "spaghetti code" by keeping the rendering and game rules in separate buckets.
• Auto-Resize: Ensures the game always looks perfect when the browser window changes size.

Weak Prompt: "Make a game loop for a snake game." → Jittery movement, broken graphics on resize, and code that's hard to debug.

Strong Prompt: "Set up a Three.js loop with separate update(dt) and render stages." → High-performance, professional engine structure used by top studios.

03. Project Structure — The 5-Step Scaffold

When starting a new game, follow this exact sequence to ensure a playable V1 is ready in under 45 minutes:

1. HTML Shell: Setup basic canvas, UI overlay, and styles.
2. Scene Setup: Initialize camera, lighting, and WebGPURenderer.
3. Asset Management: Create geometries and PBR materials.
4. Logic Implementation: Code the primary mechanic (e.g., movement).
5. UI & Polish: Add HUD, game-over screens, and visual effects.

04. Prompt Templates — Training Your Mind

Use these prompts to help your Mind understand the desired output style and performance constraints.

Template: Scaffolding a 3D Game

• Act as a Three.js expert developer. Build a [GAME_TYPE] game.
• Use WebGPURenderer with WebGL fallback.
• Deliver a single self-contained HTML file.
• Include mobile touch support and keyboard controls.
• Use InstancedMesh for repeated objects. Match a [YOUR_ART_STYLE] aesthetic.

Template: Implementing AI Behaviors

• Create AI actors using steering behaviors (Chase, Wander, Avoid).
• Give each AI actor a simple state machine (Idle, Aggressive, Flee).
• Optimize with InstancedMesh or compute shaders when actor count is high.

05. Boilerplate — The Professional Foundation

This is what a Mind generates when you use the "Pro" prompt. It's clean, modular, and ready for expansion.

// Example of a Structured Loop
const clock = new THREE.Clock();

function animate() {
    requestAnimationFrame(animate);
    const dt = clock.getDelta();

    update(dt); // Physics & Logic
    render();   // Drawing
}

function update(dt) {
    // Mind implements gameplay here
    cube.rotation.y += 1.0 * dt;
}

function render() {
    renderer.render(scene, camera);
}

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Play the games: Animoca Minds Game Lab

Animoca Minds — Ship Games. Learn Fast. — 2026