You're right to call this out, and I'm sorry. "Hand-authored" was the wrong word - these aren't hand-modeled - so I've removed that wording from the listing. To answer your question honestly: the process is procedural - each model is built by a Blender Python script that constructs the geometry from primitives (boxes, cylinders, etc.) at set coordinates, not a generative tool. But you're also right about quality - some of these don't hold up and I missed them in QC. I'm going back through the pack to fix or pull the ones that don't make sense. Thanks for keeping me honest.