Ultra Engine

Per-biome plant density override. Biomes with low Rust base_density (desert 0.05, mountain 0.1, tundra 0.15) get plant_level=0 at generation — no fauna at all. Drag a slider — the world re-places instantly (no WASM rebuild).

Set wall edges before building.

One tint for the whole lit image — terrain, water, rivers, roads, walls, models and the sky palette. Ambient and shadow keep their own colours on purpose: warm sun over a blue ambient reads as a colour cast, not as warm light.

Click a hex on the map first — the model is placed at the selected point.