X: Tim Jayas's Three.js Steam-Engine Prototype Prompt

Original prompt

Create a 3d steam engine working prototype using three.js. use white theme background so main object is clearly visible

Use case

The author used the same prompt to compare Grok 4.6 with Qwen3.8 Max, and said that Qwen3.8 Max performed strongly. Someone in the comments asked for the prompt, and the author published the text above.

Prompt structure

• Specify the output object: A 3D steam engine.

• Specify the technology stack: Three.js.

• Specify the interaction requirement: A working prototype.

• Specify the visual condition: A white background to keep the main object clear.

More complete engineering version

Create a working 3D steam-engine prototype using Three.js.
Show the main moving parts clearly on a white background. Add start/stop controls and a speed control.
Keep the camera and lighting readable. Test that animation, controls, and resizing work without console errors, then return the runnable result.

The original prompt is suitable for a quick capability comparison; the engineering version adds interaction and acceptance criteria, making it better suited to a real development task.