Use the Occlusion Area component to define View Volumes in the occlusion culling system. View Volumes are areas of the Scene where the Camera is likely to be at runtime. At bake time, Unity generates higher precision data within View Volumes. At runtime, Unity performs higher precision calculations when the Camera is within a View Volume.
If you have not defined any View Volumes in your Scene, Unity creates a View Volume at bake time that contains all Scene geometry that is marked as Occluder Static or Occludee Static. This can lead to unnecessarily large data size, slow bake times and resource-intensive runtime calculations in large or complex Scenes. To avoid this, place Occlusion Areas in your Scene to define View Volumes for the areas where the Camera is likely to be.
|Size||Set the size of the Occlusion Area.|
|Center||Set the center of the Occlusion Area. By default this is 0,0,0 and is located in the center of the box.|
|Is View Volume||If enabled, the Occlusion Area defines a View Volume. If disabled, the Occlusion Area does not define a View Volume. This must be enabled for an Occlusion Area to work.|