Illustration and image variants used to be a budget line; now they're a pipeline — saved styles, reusable prompts, human art direction at the front and a usage-rights policy bolted to the side. This playbook builds the production line that generates on-brand assets at scale without generating legal or brand debt.
Workflow area: Design Ops · Tier: Foundation · Hands-on time: ~30 minutes to stand up
The volume problem is real: empty states, onboarding art, blog headers, seasonal variants, localized imagery — a mid-sized product consumes hundreds of assets a year, and "we'll commission it" quietly becomes "we'll skip it." Generation solves volume. What it doesn't solve is coherence and rights: fifty assets that each look plausible and collectively look like fifty different products, generated under terms nobody read. The pipeline is style codification plus art direction plus policy — the generation step is the easy 20%.
Codify your visual style as a written spec. Gather 6–10 existing approved assets and have a vision model reverse-engineer the style in words:
These are approved brand illustrations. Write a STYLE SPEC that
would let an image model reproduce the style without seeing them:
- Line quality, weight, corner treatment
- Color palette (name hexes if visible) and how colors are
distributed
- Composition rules: density, negative space, perspective
- Human figures: proportions, diversity representation, level of
abstraction
- What this style NEVER does (gradients? photorealism? outlines?)
[ATTACH 6-10 APPROVED ASSETS]
Edit the spec against your actual brand guidelines — the model describes what it sees, and what it sees includes accidents.
Build the master prompt and lock it as a saved style. Combine the spec into a reusable prompt block. In Midjourney, encode it as a saved style/profile reference; in Adobe Firefly, build it as a style reference plus brand-kit colors; in Figma Weave, keep the block pinned for in-canvas generation and restyles. The master prompt is versioned like a design token — changes go through review, not vibes.
Art-direct every batch; never prompt-and-publish. Generation runs per asset class: master prompt + subject line + format specs. Direct like you'd direct a human illustrator — good direction notes look like:
BATCH: empty states, 4 subjects (no results / no connection /
first use / all done)
Round 1: composition too dense on "no results" — more negative
space, subject smaller. "All done" reads as celebration; brand
register is calm — remove confetti.
Round 2: approved 3 of 4. "First use" hands are wrong — regenerate
hands or crop above wrists.
The reject-and-redirect notes are the pipeline's quality system; keep them with the batch.
Post-process into system assets. Winning generations get cleaned in your design tools — cropped to format, colors snapped to brand tokens where the model drifted, exported at the pipeline's standard sizes, filed with the naming convention pb-10's hygiene rules established. An asset isn't done until it's a library asset, not a download.
Write the rights-and-disclosure policy before scale-up. One page, ratified with whoever owns legal risk:
Draft a one-page generative-asset policy covering:
- TOOLS: which generators are approved, under which license tier,
and what their terms say about commercial use and training
- RIGHTS: what we can claim over generated output per tool;
where human authorship must be added for protectability
- INPUTS: what may never be used as a style reference (competitor
art, unlicensed artists' work, client IP without contract cover)
- DISCLOSURE: where we label assets as AI-generated (and where
regulation or platform policy requires it)
- PEOPLE: rules for generated human likenesses
Blunt language. Name an owner for exceptions.
Generator terms differ sharply on commercial use, training on your inputs, and rights over outputs — read the current terms for your license tier before client or commercial work, never upload client IP as style reference without contract cover, and honor disclosure requirements where you operate.
The pipeline is style codification, human art direction and a rights policy — generation is just the middle step, and it's the only step the machine does alone.