Isometric Winter Village Diorama with Procedural Snow and Light

Prompt: An isometric winter-village diorama on Christmas Eve: a small alpine hamlet at dusk, snow falling softly over steep roofs and a frozen pond. Include: a timber chalet with warm glowing windows and smoke curling from the chimney, a tall fir decorated with string lights and a star, a little stone church with a lit bell tower, a frozen pond with a few skaters gliding in slow loops, a sled leaning on a fence, lanterns along a snowy path, pine trees heavy with snow, a wooden sleigh with gift boxes. The village stands on a floating block with a cutaway edge showing the snowpack layers, frozen soil, rock and roots in section, and the pond's ice sheet over dark still water. Soft studio-like background, gentle tilt-shift feel. Snow and light are the subject; make them the best you can in a browser: - Snowfall: thousands of GPU-instanced flakes with varied size, drift, gentle turbulence and parallax depth; flakes catch the light near lamps and windows. - Snowpack: soft rounded drifts on roofs, eaves and branches, subtle sparkle (view-dependent glints), cool blue shadows, warm bounce near light sources. - Ice: the pond is slightly translucent with frosted edges, faint cracks, and reflections of the tree lights and sky; skater trails etched into the surface. - Light: warm 2700K window and lantern glow against a cold blue-violet twilight, bloom on string lights, twinkling bulbs that cycle slowly, chimney smoke lit from below. Colour: dusk gradient from deep indigo overhead to pale lavender at the horizon; snow in blue-white shadows and cream highlights; warm amber and red accents only where light falls. Drag to rotate, wheel to zoom; it idles with a slow turn and runs smoothly forever (60fps, no memory growth, particles recycled). Use Three.js, everything procedural (geometry, textures, noise, shaders), no other external assets. Single self-contained HTML file.