Does Paraview or Visit have any filters to draw a smooth surface for a set of points?
In Paraview you can try the following :
- Delaunay2D (for creating a surface - see http://www.vtk.org/Wiki/VTK/Examples/Python/Filtering/Delaunay2D )
- LoopSubdivision (will also create new cells / new points)
I know that you asked for filters in Paraview or VisIT. But, you could use another open source tool to reconstruct the surface first, such as MeshLab