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16.4 LPE for specific light types

 
In the next step the goal is to separate the light coming from the environment (ifmHosekSkylight and/or ifmImageBasedlighting) and the light emitting plane in the ceiling.
 
These are the LPEs to separate the environment lighting:
 
 
Environment lighting alone = Le.*E
 
Environment lighting alone: Le.*E
 
 
Environment lighting alone without the light emission of environment lighting itself = Le.+E
 
Environment lighting alone without the light emission of environment lighting itself =  Le.+E
 
To get the lighting from the light emitting objects, it is necessary to add a handle name to all involved light emitting objects. This handle name must be set in the Iray section of the Attribute Editor. The LPE to adress objects with a handle name is <L'handlename'>.*E
 
Note:
 
Light only from a light emitting object  =  <L'handlename'>.*E
 
 
When the lighting only from a light emitting object without the object itself is needed use the following LPE = <L'handlename'>.+E
 
Light only from a light emitting object without the object itself = <L'handlename'>.+E