A CD case that opens, and it is only shaders

A jewel case is a memory test. Everyone knows how the lid resists, how the hinge looks cheap and correct, how the disc catches a white line of light. Ann Nguyen asked Claude Opus 5.5 for that, with an open-lid animation, and no 3D model — three.js and shaders only.

"No mesh" is the constraint that makes it a vibe-coding entry rather than a product render. The plastic has to be a material someone described in code: thickness, refraction, the little teeth. If any of those are off, the object becomes a prop from a different decade.

She says she couldn't ask for more. That is a finishing line, and finishing is the rare part. Most shader toys announce themselves. This one tries to be a CD case.