Hi All, Thanks to everyone and for the responses to and encouragement about my query on visualizing molecular orbitals in pymol.
I'm using PyMol 0.99rc6. I feel like I'm quite close to a solution. I've developed a routine to compute a 3 dimensional matrix containing the probability amplitudes of the orbitals, which I can load into a PyMol brick object. Then, things start to go wrong.... When I use the load_brick function in the cmd module; cmd.load_brick(brik, "Brick") or alternatively, cmd.load_object(loadable.brick, brik, "Brik") PyMol returns the message; ObjectMap: Map Read. Range = 0.000 to 0.000 but it does display the object "Brick" in the objects menu. I can then create an isomesh or surface with the command; cmd.isosurface("BrikSurf", "Brick", 0.1) But no surface is displayed on screen. The example file brick01.py that is included in examples/devel does something almost identical to what I'm trying to do, it displays an exponentially decaying density, but also with no success in PyMol 0.99rc6. Is there a bug somewhere in the load_brick function that I'm running into? Thanks a lot! bmb197