TL;DR of the post, generated automatically.

A developer shares a browser driving game on living sand, built on three.js' WebGPURenderer and TSL with no game or physics engine.

• Simulation: A 512 × 512 m sand field at 1 m, with a 25 cm field around the vehicle, stepped at 60 Hz.
• Tyres: Bekker-Wong sinkage and Mason traction, on a 240 Hz pickup, with the sand the tyres displace read back around the vehicle.
• Rendering: The sand step runs as fragment passes on ping-pong render targets, with zero sand textures.
• Status: A demo is coming soon, and there's a video on X.