both these files seem to have the same problem with misoriented faces. i found the option to turn on and off backface culling in mayavi.
1. select the "surfacemap" module click on "configure" 2. in the configure window, select show pipeline, expand the tree and doubleclick actor-property 3. turn on frontface culling and "apply" maybe you can try this and see if it reveals the mis-oriented faces in your viewer? you can also see the problem by visualizing the components of the cellNormals in paraview. regards, charless
For whatever it's worths, I've posted the two .vtk files I generated to the wiki: https://www.matforge.org/fipy/attachment/wiki/SurfaceOfSphere/ sphereNIST1,63.2.vtk https://www.matforge.org/fipy/attachment/wiki/SurfaceOfSphere/ sphereNIST2.0.4.vtk
