In Gaffer 0.56, we've made significant improvements to the visualisation of area lights. This video dives into the details, and talks about the varying support for connected shader networks:
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We've made a long-awaited tweak to the Set node in the recently released Gaffer 0.56.0.0. The confusing Paths plug .vs. PathFilter debate is finally over.
TL;DR: Just
Gaffer allows scene locations to be organised into sets, and then uses a simple expression language to combine sets for use in light linking, shader assignments and the like. In this short post