[PyMOL] clipping planes

[Nathaniel E. <na...@ma...>]

I don't understand how these work at all.  Is there any straightforward 
way, given a structure's position and dimensions and the desired camera
position, to calculate the ideal position for the plane?   How does
PyMOL decide where to put the planes?  Right now I'm missing by a small
amount and atoms disappear randomly.

thanks,
Nat