[vtkusers] Lens Distortion

[Sahan]

Dear All,

I am a postgraduate student in Sri Lanka. I am developing a software for the 
laparoscopic surgery. I make a 3D image and then I need to put a mask which is 
black everywhere but in the center for a radious of about 500 pixels....through 
which I want to see my 3D model behind.
I tried to change vtkCamera - SetViewAngle, vtkWarpLens, but failed. If anyone 
knows how to do it, please let me know. Thank you.

Regards,
Sahan