Hi Jeff, The Chimera IMOD model file reader reads through all the data in the IMOD file but ignores everything except the meshes. Here is the file format specification I used to write the code http://bio3d.colorado.edu/imod/doc/binspec.html The Chimera Python code is in the IMOD directory obtained from the Chimera experimental features web page http://www.cgl.ucsf.edu/chimera/experimental/experimental.html in files IMOD/imod.py IMOD/imod_spec.py That code could be improved to display the contour data although Chimera does not have a high efficiency rendering of 1-dimensional curves. Using path tracer markers and links (equivalent to atoms and bonds) would consume alot of memory (a few kbytes per point). Tom