Change Details

Cycles supports lights with "negative strength". However the light tree didn't properly handle these lights. And under certain circumstances there could be large increases in noise. For example, in the scene I have attached below there are two lights configured to be opposites of each other. The combined energy of these lights in master is `1000 - 1000`, which means the node these lights occupy has in the light tree has "zero energy" and the lights never get directly sampled, which results in a large increase in noise. {F14044163} |Master|This Patch| |{F14044159}|{F14044161}|

Cycles supports lights with "negative strength". However the light tree didn't properly handle these lights. And under certain circumstances there could be large increases in noise. For example, in the scene I have attached below there are two lights configured to be opposites of each other. The combined energy of these lights in master is `1000 - 1000`, which means the node these lights occupy in the light tree has "zero energy" and the direct sampling of these lights are skipped, which results in a large increase in noise. {F14044163} |Master|This Patch| |{F14044159}|{F14044161}|

Cycles supports lights with "negative strength". However the light tree didn't properly handle these lights. And under certain circumstances there could be large increases in noise. For example, in the scene I have attached below there are two lights configured to be opposites of each other. The combined energy of these lights in master is `1000 - 1000`, which means the node these lights occupy has in the light tree has "zero energy" and the lights neverdirect sampling get directly sampledof these lights are skipped, which results in a large increase in noise. {F14044163} |Master|This Patch| |{F14044159}|{F14044161}|