Lighthouse Beam Storm
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A lighthouse sweeps its beam over a raging night sea while rain falls and lightning flickers. The rotating spotlight beam is a semi-transparent additive-blended cone mesh synced to a real THREE.SpotLight target, the sea is a 100x100-segment plane displaced each frame with layered sine waves, and rain is a 6000-point BufferGeometry recycled once drops fall below the waterline.
Raindrops: 6000
Beam sweep speed: 0.5 rad/s
Sea grid: 100x100 segments, 400x400 units
Lightning interval: ~4-12s, flash intensity 4-7
Palette: cold blue-grey with warm lantern glow