Polygon Streaming Project Settings
This page details how to control the global settings of VIVERSE Polygon Streaming within your PlayCanas project when using the VIVERSE PlayCanvas extension.
Polygon Streaming project settings are only available when using the VIVERSE extension of the PlayCanvas editor.
Stream Controller Component
The Stream Controller or Polygon Streaming Settings (VIVERSE SDK) manages the streaming of models and streaming parameters inside your project. It can be found under Viverse Scene Settings.
When Occlusion Culling is enabled objects that are hidden by other objects will not be rendered. It depends on the model how much occlusion culling will improve performance.
Occlusion Geometry allows you to specify what is used to check if a mesh is occluded. Bounding Box option is faster but less accurate while the Mesh option is slower but more accurate. Bounding Box should be sufficient in most cases.
Occlusion Query Frequency determines how many times a second meshes are checked if they are occluded. A lower value will increase performance but meshes will take longer to reappear.
The Triangle Budget is a limit on the amount of triangles that will be drawn per frame. Increasing this will lead to better visual quality, but of course also higher processing and memory utilization. It's recommended to keep Triangle Budget to at least 30% of the full amount of polygons that you are going to stream. For example, if you are going to stream a 3D model of 10 million polygons, it's recommended to use a Triangle Budget of at least 3 million.
The Mobile Triangle Budget is the same as Triangle Budget, however it will be applied in case the system identifies the user is visiting the experience via a mobile device.
With a Distance Factor above 1 nearby objects are given preference when allocating triangles. A value below 1 gives preference to further away objects and a value of 1 is neutral.
It will stop improving geometry when it reaches the Maximum Quality. This can be used to stop far away objects from showing more detail than is necessary. Setting a value of 0 means there is no limit on quality apart from the triangle budget.
Details of parameters are also set on the Supported Parameters section.
Supported Parameters
Occlusion Culling
Enable Dynamic Occlusion Culling.
FALSE
FALSE
TRUE
FALSE
FALSE
FALSE
Occlusion Geometry
Mesh: Use the mesh to check if it's occluded Bounding Box: Use the bounding box of the mesh to check if it's occluded.
Bounding Box
Bounding Box
Bounding Box
Bounding Box
Bounding Box
Bounding Box
Occlusion Query Frequency
Value is in times per second. A value of 0 means will it run on every frame.
0
8
60
5
8
12
Triangle Budget
The maximum amount of triangles that you want to be in the scene at any single point.
0
5000000
Depends on device
Mobile won't use this parameter
5000000
5000000
Mobile Triangle Budget
The triangle budget used on a mobile device. If it is set to 0 it will use the non-mobile triangle budget.
0
3000000
Depends on device
3000000
PC won't use this parameter
PC won't use this parameter
Distance Factor
Preference for nearby objects over objects further away. Values above one mean a preference for nearby objects. Values below one mean a preference for objects further away. One is neutral.
0
1.1
10
1.1
1.1
1.1
Maximum Quality
Stops improving geometry that exceeds the maximum quality. This can be used to stop far away objects from showing more detail which can be wasteful. Leaving this at 0 means there is no maximum quality.
0
15000
300000
15000
15000
0
Last updated
Was this helpful?