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
Browser-Based Medieval European-Style 3D Castle
Create a browser-based, interactive 3D castle in a medieval European style. Include a moat, drawbridge, towers, stone walls, flags, and a forest, with the ability to switch between day and night. Prioritize the appearance and quality of the 3D model above all else.
About this example
A starting brief based on the creator's public project, not a verbatim original prompt. Your result will vary.
3DMedieval EuropeCastleBrowserMoatDrawbridgeTowerStone Wall
The prompt
Create an interactive 3D medieval European-style castle that can be operated in a browser. Include a moat, drawbridge, towers, stone walls, flags, a forest, and day/night switching.
This is a benchmark, so prioritize the visual quality of the 3D model and push the appearance as far as possible.
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.
