2009

Increasing the Shadow Quality value produces a more accurate penumbra (soft area)
within the contour defined by the Shadow Integrity value.
Sample Spread The radius, in pixels, to blur the antialiased edge.
NOTE As this value increases, so does the quality of the blur. However, increasing
this value also increases the likelihood of missing small objects. To avoid this
problem, increase the value of Shadow Integrity.
Shadow Bias The minimum distance that an object must be from the point
being shaded in order to cast a shadow. This prevents blurred shadows from
affecting surfaces they shouldn't.
NOTE As you increase the blur value, you should also increase the bias.
Jitter Amount Adds randomness to the ray positions. The rays are initially in
a very regular pattern, which can show up in the blurry part of the shadow
as regular artifacts. Jittering will convert these artifacts to noise, which is
generally less noticeable to the eye. Recommended values are 0.25 to 1.0.
However, very blurry shadows require more jitter.
Shadow Types and Shadow Controls | 5127