can't use cell picker with non planar quads
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
The intersection routines in vtkQuad and vtkPolygon don't do a good job when there are non planar quads and non planar polygons.
See attached script. And hold the 'p' key down while mousing around the left quad. When the mouse goes over the bottom right part of the left quad, the quad won't be picked.