Start with the right workspace
Open your preferred coding assistant or 3D tool. Use the model shown on the example as a starting point, and check any linked project for setup instructions.
Claude Opus 5.5Reference brief
Endless procedurally generated Three.js world
A prompt attributed by argofowl to “opus 5.5 extra high” requesting a browser-based Three.js project: a calm, endlessly procedural world to freely roam, with interactive entities, surprises, a defined goal, and a completion chime for playtesting.
About this example
A starting brief based on the creator's public project, not a verbatim original prompt. Your result will vary.
Three.jsprocedural generationendless worldbrowser gamefree roaminginteractive entitiescozyrelaxing
The prompt
create a new project in my projects folder called "endless-game": an endless, procedurally generated world built with three.js in the browser that i can roam freely and just enjoy. every area should be randomly generated, with surprises everywhere no matter how long i play. it should feel calm, relaxing and genuinely fun, like the cozy, satisfying vibe of a supermarket simulator, but it shouldn't be a supermarket game. i want a really interesting world to walk around in, with entities i can meet and interact with, and really cool graphics. set a clear goal for the project, keep working until you reach it, and play a sound chime when it's done and ready for me to play and test.
How to use this prompt
Choose one thing to change
Swap the subject, art style or setting. Keep the camera and interaction clear. Build a small version first, then refine one detail at a time.
Give the scene its own assets
For a custom character or prop, create a 3D model from a short object description or reference image, then bring it into your project.
Previews belong to their respective creators. Check the original source and project license before reusing code or assets.
