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## LostCities 1.21-8.4.0 - Hierarchical streets: #### - Added versioned hierarchical street generation with primary, secondary, and tertiary roads, wider primary roads, slopes, connectors, and deterministic large bridges. Existing worlds keep legacy street generation #### - Added an optional city-style `tertiaryparts` street asset family, defaulting to the secondary-road `parts` family #### - Added a separate `openLotParkChance` profile option, defaulting to 0.8, so hierarchical open lots use varied park parts more often without changing legacy park frequency - Inter-city highways: #### - Added a versioned inter-city highway network which creates deterministic routes between likely city regions, with endpoint-based or fixed highway levels. Existing worlds keep legacy highway generation #### - Added dedicated highway bend and T-junction parts #### - Added highway-side gas stations and two-chunk restaurants with parking lots, automatic highway-facing rotation, matching deck heights, and configurable foundation supports #### - Fixed rotated restaurant doors, opened highway railing for restaurant and gas-station access, and added two-high restaurant perimeter railings - Buildings and structure avoidance: #### - Structure avoidance now treats each multibuilding as a single footprint, so it is either generated completely or avoided completely #### - Fixed chunk-generation crashes while checking villages and avoided structures outside the active 1.21 structure-reference area #### - Fixed scattered multibuildings sometimes generating only partially. Their complete placement and validity are now decided once for the entire scattered area #### - Fixed bugs in blacklisted-structure checks that could miss structures or fail on structure references without registry keys - Performance and stability: #### - Improved performance when searching for forced building spawn locations #### - Reworked world generation for safe multithreading. Non-overlapping chunks and different dimensions can generate concurrently while nearby chunks and lifecycle cleanup remain protected - Assets, tools, and documentation: #### - City styles can now override hierarchical open-lot park frequency with `profile_overrides.openLotParkChance`, independently from legacy park chance #### - Added `forcedair` part metadata for hard-air cells #### - The `/lostcities debug` command now reports the containing multibuilding name #### - Added practical profile customization examples and developer documentation for custom assets, city generation, and world-generation thread safety