2008

Low The image buffer is not filtered but directly sampled instead. This option
is fine for 8-bit images,
AVI on page 7118 files, and so on.
Medium Adjacent pixels are sampled and averaged. This produces a very
significant improvement in cases where you’re getting banding types of
artifacts. It is slower than Low.
High Adjacent pixels and the diagonal pixels are sampled, and each are given
different weights. This is the slowest method and provides somewhat better
quality than Medium.
Use Light Smp Range Blurs the shadows cast in the volume based on the
Sample Range value in the light's shadow parameters. Because increasing the
Smp Range value blurs the shadow cast by the light, this makes shadows in
the fog better match cast shadows, and helps prevent aliasing in the fog
shadows.
TIP With the Use Light Smp Range option, the higher the light's Smp Range value,
the slower the rendering. However, with this option you can usually get good
results with a lower Sample Volume % setting (such as 4), which reduces rendering
time.
Sample Volume % Controls the rate at which the volume is sampled. Ranges
1 through 10,000 (where 1 is the lowest quality and 10,000 is the highest
quality).
Auto Controls the Sample Volume % parameter automatically and disables
the spinner (this is the default). The preset sampling rates are as follows:
low=8; medium=25; high=50
Because the parameter ranges up to 100 there's still room to set it higher.
Increasing the Sample Volume % parameter definitely slows things down, but
in some cases you may want to increase it (for extremely high sample quality).
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