Occluder

Occluder is a box-shaped object that is used to cull objects' surfaces, bounds of which are not visible behind it. The surfaces behind the Occluder are not sent to the GPU, thereby saving performance.

Depending on the Back Face parameter value, the front or back faces of Occluder are used to cull surfaces. The front faces of Occluder are the sides of the Occluder that face the camera. The back faces of Occluder are the sides that are behind the front faces.

Schematically, the Occluder faces can be shown as follows:

Front faces of Occluder	Back faces of Occluder

See also#

To create Occluder via UnigineEditor:

1. Run the project with UnigineEditor.

2. On the Menu bar, click Create -> Optimization -> Occluder.

   

3. Place the Occluder in the world and specify the required parameters for it.

On the Node tab of the Parameters window, you can adjust the following parameters of Occluder:

Edit Size	Toggles the editing mode for the Occluder node on and off. When enabled, the Occluder box sides that can be resized are highlighted with the colored rectangles. To change the size of a side, drag the corresponding rectangle.
Back Face	Indicates whether the back faces of the Occluder box are used instead of front faces to occlude objects. If unchecked, the front faces will be used. Back Face is unchecked Back Face is checked
Size	Size of Occluder along the axes.
Distance	Distance between the camera and the bounding box of Occluder, at which the Occluder becomes disabled (it isn't processed by the CPU, hence it isn't rendered). For example, you should disable Occluder at a certain distance if it stops hiding the objects and their surfaces, in order to increase performance. By default, the parameter value is set to inf.