Structure and stream Unreal worlds in C++ — UWorld (persistent level + streaming levels), ULevel, ULevelStreaming/ULevelStreamingDynamic; explicit sublevel streaming (UGameplayStatics::LoadStreamLevel/UnloadStreamLevel, LoadLevelInstance); Level Streaming Volumes (ALevelStreamingVolume); World Composition (UWorldComposition, distance-based streaming layers, world origin rebasing) for large/open worlds; Level Blueprints (ALevelScriptActor); and the classic Hierarchical LOD proxy system (ALODActor, UHLODProxy, AHierarchicalLODVolume). Use when organizing a level, building a large or open world that cannot be fully resident, streaming zones in/out at runtime, wiring streamin…
