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Light and Shadow<br />
The quality of Shadow<br />
Unless the shadow is turned off, all objects will cast shadow under light.<br />
The quality of shadow is control by Subdivs under lighting dialog box. Rectangular light <strong>for</strong> example, under<br />
Sampling>Subdivs, please change the default 8 accordingly to get desire shadow quality. The higher number<br />
will cost more time to render. When set it to 32, you can get the almost perfect shadow without any noise.<br />
Image on the left is rendered with Subdivs set to 8; image on the right is set to 32.<br />
Radius <strong>for</strong> Shadow edge<br />
When using Point light, Spotlight and Direction light <strong>for</strong> light source, the shadow edge will be very<br />
sharp. To improve it, adjust the Radius under Shadow dialog box. Using Directional Light here <strong>for</strong><br />
example, Image on the left is rendered with Radius set to 0. Image on the right is rendered with<br />
Radius increased to 0.05<br />
74<br />
V-<strong>Ray</strong> <strong>for</strong> <strong>Rhino</strong>
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