[vtkusers] Illumination problem in polydata actor generated with vtkOBJReader

[Marcelo Amati]

Hi all,
 
I can`t see with good illumination 2 actors in the same renderer:
 
Actor 1: actor generated from a polydata created with vtkMarchingCubes. 
Actor 2: actor generated from a polydata read from a wavefront file (.obj read with vtkOBJReader). 
 
When I put all in the same renderer the actor 2 is shown too dark. I can see only the actor 1!
 
In order to solve this, I tried 2 approaches without success:
 
Approach 1: Use of vtkLight
When I use vtkLight, the actor 2 can be seen, but the actor 1 becomes too clean. 
 
Approach 2: Use of vtkPolydataNormals in polydata of actor 2
When I use vtkPolydataNormals filter in polydata of actor 2, I can see both correctly in the same renderer. However the resulting polydata loses a lot of polygons! The polygons mesh becomes too bad...
 
Does someone know how to solve this problem???
 
Thanks!
Marcelo 
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