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Sectorize works with terrain tiles and additive scenes. The active scene becomes the parent scene, and terrain sectors are stored as subscenes.

Prerequisites

  • A scene with terrain tiles.
  • At least one camera in Cameras.
  • Sectorize added to RendererStack.
The current Sectorize package includes support for Unity Terrain objects.

Create sectors

Open Sectorize in RendererStack. If no sectors exist, Sectorize shows No Sectors found. When Unity Terrains are found in the scene, click Create Sectors. Sectorize then:
  1. Marks the active scene as a parent scene.
  2. Registers already opened additive terrain scenes as sectors.
  3. Creates new additive scenes for terrain tiles in the active scene.
  4. Moves each terrain tile into its generated scene.
  5. Creates Scene Data Managers for the generated scenes.
  6. Marks generated sector scenes as subscenes.
  7. Prepares the Scene Manager integration.
Sector creation edits scenes. Make sure the scene is saved and source-controlled before creating or deleting sectors.

Work with the Sectors tab

After sectors exist, Sectorize shows three tabs:
  • Sectors
  • Scene Settings
  • Global Settings
Use Sectors to review generated sector scenes. Use Delete Sectors only when you want to delete generated additive scenes and bring terrains back into the active scene.

Configure cameras

Sectorize uses the shared Cameras scene setting. Every active non-ignored camera can load sectors. During each render update, Sectorize checks sectors around the camera position and applies the active Streaming Rules.

Configure Streaming Rules

Open Global Settings > Streaming Rules. Start with these defaults:
Keep Immediately Loading smaller than the asynchronous loading distance. A large immediate radius can force too many scenes to load in one frame.

Manual scene control

Right-click Sectorize and enable Enable Manual Scene Control. When manual scene control is enabled in Edit Mode, Sectorize stops automatic streaming. The Sectors tab shows:
  • Load All Scenes
  • Unload All Scenes
Use this when you need to inspect or edit generated sector scenes manually.

Debug visualization

Right-click Sectorize and enable:
  • Debug > All Cells — draws all sector bounds in blue.
  • Debug > Visible Cells — draws loading ranges and visible sector bounds.
In visible-cell debug:
  • red circle shows Immediately Loading distance;
  • blue circle shows Asynchronous Loading distance;
  • yellow circle shows Preventing Unloading distance;
  • green boxes show sectors found around the camera.