Matthias Fabry

Thanks for your quick reply. There is no particular reason I chose vtk 8, except that I've read around on the issues that there are some issues with vtk 9...

This does seem to be a qt or pyface issue. No matter where I install vtk/pyqt or mayavi from, I still hit the `RuntimeError: No pyface.toolkits plugin found for toolkit...

After some more trial and error using different installation channels and reverting to python3.6, I finally get a satisfactory mlab interface again. now I have: ``` conda list: apptools 5.1.0...