[vtkusers] Change background-color of rendering window

[Marc Cotran]

Rashed Karim wrote:
>
> A very trivial question. Is there a way to change the color of the 
> rendering window. My renderings appear on a black background. I want 
> to change this background color to some other color.
Take a look at vtkViewport->SetBackground().

vtkRenderer inherits vtkViewport.

Marc