paprika3D puts Three.js scenes on the test bench

Field notes

The docs describe a headless-page workflow rather than screen capture: images come from the tool's own page, while scene objects and state are exposed for inspection. A game-checking convention can provide state as JSON before and after each input. The page also documents geometry operations—including booleans, hulls, extrusion, and seeded scatter—and says Manifold is built in.