Every generated image arrives with a specification, whether you wrote one or not. If you did not write it, the defaults wrote it for you — and defaults are chosen for the average job, which is rarely your job. Reading the spec sheet like a buyer means knowing which lines change the product and which lines are garnish.
The lines that change the product
Aspect and dimensions. A tall 832×1248 frame is composed for a feed and a phone screen; asking a generator for a portrait and then cropping it square for a store thumbnail throws away the composition you paid for. Decide the destination first and generate at its shape. Tier. Standard and premium are not good and bad — they are draft and finish. The standard tier’s job is to let you test ten specifications cheaply; the premium tier’s job is to render the winning one properly. Buying premium first is paying finish prices for fitting-room work.
Light. The single most under-specified line in most briefs. “Evening light” is a mood; “candlelight from frame left, soft shadows” is a specification, and specifications are what render consistently. Materials. Satin, marble, patent leather, brushed steel — named materials are how a frame stops looking generic, because rendering engines treat named surfaces as instructions rather than adjectives.
The lines that are garnish
Quality adjectives — stunning, masterpiece, ultra-detailed — change almost nothing measurable and crowd out the lines that do. The same goes for stacking three settings, four props and two actions into one brief: the specification becomes a crowd scene in which nothing is specified at all. One subject, one action, one setting, named light, named materials. That is a spec sheet.
The buyer’s habit
Keep your subject specification as a saved block of text, exactly as a store keeps a product’s standing spec, and treat each new brief as an order form: standing spec on top, this order’s scene lines below. When output disappoints, the form tells you which line to amend — which is the entire difference between buying images and gambling on them.