Made with Codex image generation on the native OpenAI route, in the BYK palette. Flat poster art — no photography, no 3D. Each was reviewed by the agent and regenerated if it broke the composition rules.
#120620 plum
#1A0A2E raised
#5A466D mid
#8B6FA8 light
#B4823C gold
#D4A45C gold bright
The idea
The page is one journey. You start in the night sky at the hero and end on sand at the footer, passing through the sea. Same world throughout, different depth per section — so each background is distinct, but stacked they read as a continuous descent.
The arc is measurable. Brightness: sky ~20 → surface ~80 (light hits water) → deep ~32 (submerged) → sand ~111. Temperature: cool all the way down (deep water is the coldest at −51) then flips warm (+101 at the sand). Cool blues own the middle, warm golds bracket the ends.
Pick of the set: page-04-deep-a — genuinely underwater, light shafts from the surface, open centre for a headline.
Honest flag: page-06-sand-b is the most beautiful image here and the least on-brand — that sand reads orange/desert rather than BykonzYard gold. Worth a pass to pull it back toward the palette.
The descent scroll the page = travel from night sky down through the sea to sand