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Brecht Van Lommel fe222643b4 Cycles Volume Render: add volume emission support. ...

This is done using the existing Emission node and closure (we may add a volume
emission node, not clear yet if it will be needed).

Volume emission only supports indirect light sampling which means it's not very
efficient to make small or far away bright light sources. Using direct light
sampling and MIS would be tricky and probably won't be added anytime soon. Other
renderers don't support this either as far as I know, lamps and ray visibility
tricks may be used instead.

2013-12-28 23:20:53 +01:00

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