Google says Gemini 4 Argon coded a browser-based WebGL2 fur engine in Antigravity

Google says Gemini 4 Argon, working in its Antigravity tool, coded a custom WebGL2 fur engine that runs live in the browser.

According to Google's post on X, the engine uses GPU groom shaders, procedural character meshes and animations for real-time hair physics, with an automatic lightweight fallback. Google describes the result as studio-grade 3D fur dynamics. The post is a company demonstration, and no independent test of the engine's performance or quality has been reported.