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.
GPT-6 AstraReference brief
3D kart racer in a single HTML file
A reusable prompt the author states was given unchanged to GPT Astra 6 and Claude Opus 5.5 for a comparison of their 3D kart-racing implementations.
About this example
A starting brief based on the creator's public project, not a verbatim original prompt. Your result will vary.
3D gamekart racerracing gamesingle HTML fileweb game
The prompt
build a 3D kart racer in a single HTML file.
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.
