Lighthouse in a box.

A granite island and its lighthouse, sealed in a box of sea. Twice the box is pulled sideways and let go, and the water answers.

• The water is a full 3D simulation: 2.4 million particles on a 128 × 117 × 128 grid (FLIP), with foam, whitecaps and spray, running in real time on the GPU with WebGPU. The film plays at twice real time. Try it live.
• The island was sculpted, meshed and textured in Blender; its colour was refined with image edits projected back onto the model. The lighthouse was modelled in Blender.
• Rock, plaster, stone and metal textures and the sky are from Poly Haven (CC0).