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
Railway network simulation game
Expand a Three.js train model into a railway simulation with cities, junctions, rivers and bridges. Add train-following, free 3D and isometric cameras, plus smoke effects.
About this example
A starting brief based on the creator's public project, not a verbatim original prompt. Your result will vary.
Adapted from the author’s public project description.
GPT-6 AstraThree.js
The prompt
Expand a Three.js train model into a railway simulation with cities, junctions, rivers and bridges. Add train-following, free 3D and isometric cameras, plus smoke effects.
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.
