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Procedural atmosphere sky replaces flat twilight background — Hillaire 2020 scattering with IBL fill eliminates pale gap artifacts on camera rotation
Computed gap surface normals (default on) — gap faces respond to terrain slope lighting instead of fixed Y-up
hex-grid workspace crate — layout, math, and gap geometry extracted for reuse with SVG example
Matte mineral surfaces — low reflectance (0.1) removes specular flash on dark minerals like Basalt and Obsidian
WASM fallback — AmbientLight replaces atmosphere IBL on WebGL2 where compute shaders are unavailable