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13.1.1 ifmBackscatter material

 
ifmBackscatter material with different attribute settings. The attribute Roughness on the left material is set to 0
 
Use the ifmBackscatter material when you want light to reflect back to the emitter, rather than following the standard reflection direction. This effect plays an important role in the simulation of fabrics.
 
Set material attributes in the Attribute editor window:
 
ifmBackscatter material attributes