public SoSFFloat opacityThreshold { get; }

Public ReadOnly Property opacityThreshold As SoSFFloat
	Get

public:
property SoSFFloat^ opacityThreshold {
	SoSFFloat^ get ();
}

member opacityThreshold : SoSFFloat with get

Property Value

Many volume data sets are composed of objects of interest floating in an approximately transparent "fog", depending on opacity values in the transfer function. Several effects like BOUNDARY_ALIGNED sampling, ambientOcclusion and deferredLighting need to locate the boundary between solid objects and ambient fog. This field defines a threshold in the range [0, 1]. Voxels are considered solid if their alpha value is greater than opacityThreshold.

A value of 0.0 generally works well with a transfer function containing "binary" opacity (a transfer function with only fully transparent or fully opaque colors). If this is not the case, you should set this value according to your visualization parameters. Generally between 0.1 and 0.5.

Default is 0.1, Ignore low visibility voxels.

Note
Field available since Open Inventor 9.3

Reference