design: worldmap visual identity — biomes, roads, fidelity targets

[zgeoff]

Owns the open visual-design questions the biome procgen spike surfaced. Everything here is open for exploration and discussion with Geoff — nothing is settled; the spike's vocabulary is placeholder.

Scope

• Biome roster identity and naming (with design: regions & world map #272): what the four-plus regions are, their silhouette vocabulary, palette, and neon signature
• Road/viaduct look: gauge, tint strength toward biome palette, ruin gap rate, lamp frequency, nav-line vs physical-deck hierarchy
• Density and scale tuning at map zoom now roads-as-objects exist (every pre-fix verdict predates them)
• Fog vs revealed-content interplay: does structure glow beyond the frontier leak "earned sight"? (geometry is public plane — design-feel call, not security)
• Does terrain relief ever affect traversal, or stay purely visual?
• Panel-wear/detail shader tier and overall fidelity target per zoom regime
• Sump / Verdant Decks grammars once the roster names them

Notes

• Spike findings and art-direction decisions so far: https://github.com/zgeoff/vers/blob/spike/biome-scatter-grammar/HARVEST.md
• Feeds the kit-pipeline spike and the scatter grammar's biome tables