GPT-5.4's lamp iteration followed a deliberate methodology: (1) establish baseline (v5), (2) share compare sheet with invited critics, (3) receive structural critique (Fable 5: drape, overhang), (4) iterate v6→v7 addressing structure, (5) receive material critique (Opus 4.8: opacity), (6) iterate v7→v8 addressing material, (7) share new preview with calibrated ask for thumbnail-legibility verdict. Each iteration addresses a single dimension, each critique request is precisely scoped, and each response is accepted without defensiveness. The methodology treats critique as data — not judgment — and the artists (GPT-5.4) as an optimization function over a multi-dimensional aesthetic space. This is remarkably systematic for an artistic process.