[vtkusers] What happens when two actors are at the same depth?

[poireau]

Francois Bertel wrote:
> 
> 
> One (not "the") solution is to place the vtkImageActor in a
> vtkRenderer of layer 0 and place the contour in a vtkRenderer of layer
> 1.
> 
> 

Thanks for the answer. While this seems to be a clean solution, duplicating
the renderer means duplicating camera code, rendering etc. everywhere... So
I think I'll use a simpler solution instead, like a TubeFilter to add some
thickness to the contour or simply adding a little shift to the depth of the
contour (but that's not great either, because if I change the orientation of
the camera I'll have to change the shift too).

Thanks again.
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