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The cloud scene rendered with Multi-Scattering Approx. set to 0 (left) and 1 (right) with default Bleed and Contribution.
| Warning |
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Setting Multi-Scattering Approx to values other than 0 or 1 may not produce visually correct images |
MS Approx Bleed
The MS Approx Bleed parameter controls how much light bleeds through a volume. Higher Bleed values allow more light to pass through the volume and light areas that would otherwise be shadowed. As such, the effect of MS Approx Bleed is most visible in shadowed areas of a volume, but it also creates a slight overall brightening effect. You can use the bleed parameter to compensate for the overall loss of brightness caused by lower Max Path Lengths.
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The cloud scene rendered with Bleed set to 0.1 (left) and 0.9 (right) with default Contribution.
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MS Approx Contribution
The MS Approx Contribution parameter controls how much the light bleed from the Bleed parameter contributes to the brightness of the volume. Increasing Contribution tends to increase the overall brightness of the cloud, but it brightens fringes slightly less. You can use the Contribution to help bring out detail along the edges of a volume.
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