The Ambient Occlusion maps within Knald are generated one the fly from the Normal & Height Maps provided by The Integrator. They are adjustable in real time and produce extremely high quality and clean results that rival baked AO at 600+ rays.
AO Scale: The strength of the image based AO, irrespective of the Global Intensity slider.
Mesh AO: This check box is a toggle to enable and disable Low Poly Ambient Occlusion via an imported mesh.
Opacity: The level of opacity used when mixing the Low Poly Ambient Occlusion with the image based Ambient Occlusion.
Rays: This slider is used to determine the number of samples in a discrete evaluation of the integral across the half sphere for diffuse outgoing radiance with a constant radiance field with a minimum of 256 and maximum of 8192 rays being available.
Bias: A bias value based upon mesh density. A value of 10 should be good in most situations.