Variable Bond Thickness

Now we can render our model molecules with “variable” bond thickness, so that molecules that are further away have thinner bond widths (and as we zoom in, they get thicker). You might call this “Natural” Bond Width Mode.

I am not sure if this should be the default, so I didn’t make it so. You can turn it on with:

(set-use-variable-bond-thickness 1)

or in python

set_use_variable_bond_thickness(1)

Request by Erec Stebbins.