Resolved Three.js Color for vertex blending.
Road color as linear RGB 0–1.
ID of the liquid type this terrain belongs to, or undefined for solid terrain. Matches a LiquidTypeDescriptor.id.
True if this type belongs to any liquid type (convenience alias for !!liquidType).
Texture descriptor, carried through for buildTerrainTextureArray.
Pathfinding cost multiplier for road traversal. Always present; defaults to 1.0.
Runtime terrain definition consumed by ChunkManager and all geometry builders. Build via resolveTerrainDefinitions(descriptors).