Does anyone have experience making movies in Chimera used more advanced motions, besides the standard roll, rock, etc? My general idea is to use matrixget to output a series of matrices, interpolate them in my standard Python environment (which is related to the question from Vol 38, Issue 10), and create as output a Chimera script composed of hundreds of 'matrixset' matrices. The Python Computer Graphics Kit (http://cgkit.sourceforge.net) will give me the functions for quaternions, as would ScientificPython or pythonOpenGL, but a quick review of their documentation suggests that in any package it will be necessary to interpolate the rotation separately from the translation: obviously it would be more convenient if there is a package that can transparently interpolate the matrices as provided by Chimera. Has anyone gone through this issue before, hopefully with some tips for me? Thanks, Jonathan