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Dirt Color


Occluded shading color.


Unoccluded shading color.


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 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.


Trace rays in the direction of the surface normal (outside), inverse to the normal (inside), or in both directions.

Bias Normal

Add a directinoal bias to the normal vector.