S t e
p 4 :
Size of the Spot (SpotSi)
The angle of beam of your spot also has
a great effect on the blocky look of your shadows. I rendered the previous
pictures with a SpotSi set to 120.00 degrees.
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BufSi set to 512, but SpotSi set to
120.00 degrees
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Zoom: As seen previously, the shadow
is blocky
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Now let see how well does the rendering
with a smaller beam, set to 60.00 degrees.
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BufSi set to 512, but SpotSi set to
60.00 degrees
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Zoom: The shadow is more progressive,
but less than with a higher BufSi
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It is clear enough that the smallest the
angle of beam is, the sharper the borders of the shadows are. There's an
immediate conclusion to this : before setting the BufSi to any great value,
first enhance the quality of your shadows by seting the SpotSi value as
small as possible ! You will spare both memory and rendering time ! We
could say that SpotSi behaves as the Lens of a camera does.
