Dear Chimera-user list, I believe, currently, Chimera can not visualize docking spheres (http://dock.compbio.ucsf.edu/DOCK_6/dock6_manual.htm#OrientingtheLigand) files directly, in order to do so, we need to create a pdb file of the spheres and then visualize them. It would be vary helpful for DOCK users if we could visualizes spheres directly from the .sph files produced by sphgen (http://dock.compbio.ucsf.edu/DOCK_6/dock6_manual.htm#Sphgen) or sphgen_cpp. Radius and color information could then also be displayed. This might be a helpful new feature to be included in a future release of Chimera. Thank you, Trent E. Balius Graduate Student, Rizzo Group, Department of Applied Mathematics and Statistics, Stony Brook University. Office: Math Tower 3-129, Phone: (631) 632-8519 URL: http://www.ams.sunysb.edu/~tbalius/