Num Samples
Controls the number of occlusion samples per camera hit point.
Sample Distribution
Sample distribution can be uniform or cosine.
Cosine Spread
Sample spread of rays for cosine distribution. A value of f 1 gives Lambertian distribution.
Falloff
Falloff values greater than zero create a softer look. Values less than zero give a hard edge when combined with max distance.
Max Distance
The max distance at which objects may occlude.
Direction
Trace rays in the direction of the surface normal (outside), inverse to the normal (inside), or in both directions.
Bias Normal
Add a directional bias to the normal vector. Values must be specified in world space.
