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Browser racing physics in C# and WASM
Recreate a Trackmania-style racing physics system in C#, run it through WASM and render the course in Three.js. Use collidable track meshes and test vehicle handling.
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Prompt optimization tips
1
Specify editability
State which objects must remain separate, named and editable; otherwise a visually convincing shell may still be unusable.
2
Close the test loop
Ask the model to run the scene, inspect visible failures and repeat until concrete frame-rate, interaction and layout checks pass.
3
Stage long builds
For large worlds, split the work into districts, assemblies or milestones and approve each section before expanding scope.
More ideas to explore
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GPT-6 Astra
Totality Engine: Cinematic Eclipse Cathedral
A complete Three.js/WebGL prompt for a 32-second looping film inside a flooded gothic cathedral, with a monumental astronomical clock, directed camera beats, procedural water, glass planets and eclipse lighting. Chris W published an Astra run and a comparison with other models.
GPT-6 Astra
3D aerial tram game between floating islands
A verified author comment shares the full prompt that the root post says was run against GPT-6 and Gemini 4. It requests a playable browser-based Three.js tram game set on floating Mediterranean-style islands, with driving controls, passenger-comfort scoring, stations, upgrades, and mobile support.
GPT-6 Astra
Temple of Heaven Hall of Prayer for Good Harvest — TypeScript + Three.js WebGL Project
The original post showcases a 3D model and web experience of Beijing’s Temple of Heaven Hall of Prayer for Good Harvest, created with GPT-6 Astra and Three.js. The author later shared the complete Chinese prompt used to create this type of project.