Car configurator.

The brief was to let someone change the paint and the light on a car and see the result immediately — in the browser, without waiting for a render. That ruled out a pre-baked turntable and made the whole thing a realtime problem.

The model started life as a heavy Blender asset. I used GPT Astra to audit the mesh and plan the optimisation pass — what to merge, where topology had to be rebuilt by hand, and how far the polygon budget could drop before the reflection line started to break up. Clean geometry is what makes realtime light believable.

The scene itself is a Three.js WebGPU build. TSL shaders drive the paint, the clear coat, the studio lighting and the ground reflection, so every adjustment lands in the frame instantly — key light, rim, exposure, finish, and the FX pass that sweeps across the body. What you are looking at is the live viewport, not a render.