[vtkusers] my vtk objects lost color when the scence is rotated

[Boonyatee Tirawat]

Hello vtk gurus,
   I have made a class for vtkRenderWindow to embedded in window made by 
FOX toolkit. The problem is that when I try to rotate or spin the scence 
(through vtkCamara), the actors lost their colors and turn to be the gray 
objects. I have noticed that this change will occur from the second time of 
Render() call. The first move (or the first Render() ) gives the correct 
colors but the laters ain't. Do anyone give me some cues? 
My data is made from two files and used MergeFilter and 
FieldDataToAttributeDataFilter. 

Sincerelys,
Tirawat Boonyatee


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