Viz3d skill lets Claude Code build and self-correct 3D simulations

The skill operates by following a defined procedure: planning, building models, assembling the app, and self-inspecting. A key feature is the 'self-inspection' cycle, where the AI takes screenshots of its own output, measures performance, and corrects errors such as overlapping surfaces or unrealistic movements. In the simple version, the AI identified and fixed a logic bottleneck where trays filled the counter, stopping the simulation. In the Blender version, it created 13 types of equipment and 8 types of animated people. The final stage added realistic human bodies and specific tool-handling movements, with the AI correcting visual glitches like clothing clipping.

The test demonstrated that viz3d can produce functional 3D simulations with calculated metrics, camera controls, and video export capabilities. The author noted that the process is deterministic, meaning the same inputs yield the same results. The skill requires Node.js, Playwright, and ffmpeg, with Blender optional for higher fidelity. The entire process, including model creation and video generation, took approximately an hour for the Blender version.