[Bf-cycles] Energy Conservation - Where is it OK to use the Add Shader?

Greg Zaal gregzzmail at gmail.com
Fri Feb 27 22:01:23 CET 2015

As the subject says, where can the Add Shader be used without breaking
energy conservation?

I know it can definitely be used to add Volume Scatter and Absorption (to
color the volume correctly), but where else?

I also suspect it's OK to add a translucency shader to things, since that
only results in light from the back of faces (and a tiny bit on the front
face if bounces > 0, which is just light from the back face passing through
again), but I'm not completely sure.

The Hair shader has a Reflection and Transmission component - are these
intended to be added or mixed together?

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