Super |
Gets or sets a float value that helps prevent light bleeding (having areas that should be in shadow fully illuminated) for variance shadow mapping.
The value is used to map all shadow values from 0 ... ShadowThreshold to 0 and then linearly rescale the values from ShadowThreshold to 1 into 0 to 1.
For more info see "Shadow bleeding" in "Chapter 8. Summed-Area Variance Shadow Maps" (https://developer.nvidia.com/gpugems/GPUGems3/gpugems3_ch08.html)