[vtkusers] Surface artifacts from vtkVoxelContoursToSurfaceFilter

[Dan Asimov]

Hi all,

I'm trying to make a transparent surface for the heart from a stack of
medical images. I use vtkContourWidget to draw the contours then pass them
to vtkVoxelContoursToSurfaceFilter to get a surface then plot it. However, I
get a surface as in the attached image with this kind of artifacts on the
surface. I tried to smooth it using vtkSmoothPolyDataFilter but this didn't
remove them.

I thought this might occur because the surface normals are not correct, so I
tried to use the filter sequence used in the medical2 example (i.e.
vtkDataSetSurfaceFilter --> vtkPolyDataNormals --> vtkStripper -->
vtkPolyDataMapper) but still have very similar result.

What should I do to have a nice surface?

Thanks,
Dan
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