Render occlusion. @parameters

numSamples: Controls the number of occlusion samples per camera hit point. The default is 4.

distribution: Sample distribution can be uniform, cosine, or reflection. The defaul is cosine.

cosineSpread: Sample spread for cosine distribution. The defaul of 1 gives lambertian distribution.

falloff: Falloff values greater than zero create a softer look. Values less than zero give a hard edge. The default is 0.

maxDistance: The max distance at which objects may occlude. The default of 0 is infinite.

useAlbedo: Tint occlusion by material albedo. The default is 0.

VOP nodes