detecting material preview object

[Helper]

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On 18/01/2009 at 03:18, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   10+ 
Platform:   Windows  ;   Mac OSX  ; 
Language(s) :     C++  ;

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Hi,

my channel shader must differentiate between "normal" scene objects and the preview object that appears in the material manager, because it takes the geometry into account. Is it possible? Is there any property that differs from scene objects?