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

Andreu Cabré andreucabre at gmail.com
Sat Feb 28 10:45:33 CET 2015


In my limited experience, one case where it's ok is when you are adding different color glass shaders that together add up to white, specifically to fake color dispersion in glass. It might be too obvious, tho.

Regards,
Andreu Cabré

My blogs:
www.andreucabre.com
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> On Feb 27, 2015, at 10:01 PM, Greg Zaal <gregzzmail at gmail.com> wrote:
> 
> 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?
> 
> Cheers,
> Greg
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