As part of a project that I am working on, I recently wrote an extension for Chimera that exports the scene as a .vtk file which can be read into the Visualization Toolkit or Paraview.  It exports atoms (points), bonds (lines) and surfaces along with other data associated with them such as the atom and residue names, residue number, position along its chain, b-factor, occupancy, etc. in a format that can be used in VTK-based applications with the default file readers.  I think this could be a good thing to add to Chimera itself, so I was wondering if you would like to have the code for the extension to add to Chimera itself.