What the night field broke
The homepage is a real 3D scene built by an agent team. Here is everything that went black, spun around the wrong point, or skated across the ground before it worked.
Five real bugs from building the homepage's 3D night field, in the order the pipeline actually hit them: generation, export, runtime, rigging, and then the process that caught all four. Rodin's default material renders black under a point light with no environment map — fixed by dropping metalness and raising roughness, two floats, invisible until you know what the exporter ships by default. A Blender export baked an off-origin transform into vertex coordinates, so the model orbited a ghost point instead of spinning in place. Suspense placed outside the Canvas remounted the whole WebGL context on every async load until enough of those chained together and the browser dropped it. A four-legged creature's feet skated because the animation ran without a rig, and nothing enforced ground contact between amplitude, frequency, and leg length. None of these got caught by one agent generating and shipping. It took a critique panel — composition, 3D-craft, anti-slop reviewers looking at renders separately, a fixer gated on typecheck and screenshot — capped at two or three rounds because quality converges by then. The homepage isn't a metaphor for that argument about production AI. It's the argument, running live, in front of you.