Island stream diorama

1 test · 1 finished runs (1 agent, 0 raw one-shot) · 1 video

The prompt

Build a real-time 3D diorama in Three.js of a small, cosy island valley with a clear mountain stream running through it (one HTML file, CDN imports only, no external assets or textures; everything procedural). The stream is the hero: shallow, crystal-clear water you can see the pebbled bed through, with animated flow, caustic light patterns on the stones underneath, sparkling sun glints on the surface, foam and small rapids where it runs over rocks, and soft rounded river boulders of varied size partly submerged with wet darkening at the waterline. Around it: lush stylised grass and ferns that sway, a few broad-leaf trees, wildflowers, an arched stone bridge or culvert the stream flows through, stepping stones, and a small timber cottage on the bank whose windows glow warmly at night. Lighting presets in a small on-screen pill menu: Morning, Afternoon, Sunset, Blue hour, Night (night shows moonlight on the water and lit windows); transitions animate smoothly. Camera: a slow cinematic auto-fly along the stream by default, free orbit on drag, and a top-down view toggle. Ambient life: drifting petals or fireflies at night, small fish darting under the surface. Gentle procedural water ambience via Web Audio after the first click, with a mute toggle. A title card in the corner names the place. Target 60 fps on a mid-range laptop; include a quality toggle (low/high). Deliver index.html.