World Partition

World Partition & Level Streaming

• Legacy vs World Partition

• Old Method:

  • Manual division into sub-levels
  • Manual level streaming systems
  • “Cumbersome working between multiple files”

• World Partition Solution:

  • Automatic data structure
  • Distance-based streaming
  • Single large map vs multiple sub-levels
  • Loads/unloads grid cells based on distance from player

• Four Core Pillars

• One File Per Actor

  • Saves data in external hash files
  • Reduces user overlap
  • No need for level checkouts
  • Default with world partition

• Data Layers

  • Organizes actors into layers
  • Dynamic loading/unloading
  • Blueprint-driven gameplay
  • Replaces old layer system

• Level Instancing

  • Streamlined level editing
  • Multiple actors in repeatable levels

• HLOD (Hierarchical Level of Details)

  • Grid-based cell system
  • Dynamic loading at runtime
  • Creates proxy mesh/materials
  • “Reduce draw calls per frame”

• Implementation

• Enable via:

  • File > New Level > Open World
  • Window > World Settings
  • Window > World Partition

• Controls:

  • Adjust grid size
  • Set loading range
  • Enable/disable streaming

• Region Management:

  • Default: regions unloaded
  • Load via minimap selection
  • Right-click > “Load regions from selected”

World Partition revolutionizes large world management through automated cell-based streaming and efficient file management. This system significantly improves performance and team collaboration compared to traditional level systems.