[Bf-cycles] Ray passing transparent BSDF does not become transmission ray?

Gottfried Hofmann gottfried at blenderdiplom.com
Thu Nov 7 16:26:39 CET 2013

Hello Cycles Team,

recently I noticed that passing a transparent BSDF does not change the 
ray type to transmission ray as it happens with the glass BSDF. Is that 
the intended behaviour?

Here is an example .blend with two planes:

The lower one has a light path node that controls the shader via a mix 
shader node. When the ray is of type transmission, a different emission 
shader is used. This does not work when the top plane is set to 
transparent, only when it is set to glass...


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