If set to True, the dynamic soft-sphere overlap restraints are calculated. Note that they are only calculated if the scaled standard deviation of the soft-sphere overlap restraints is greater than zero. It is simpler not to pre-calculate any soft-sphere overlap restraints and to use the dynamically generated restraints alone, although this may be slower. The soft-sphere potential is simply a lower bound harmonic restraint (see Equation A.81), with standard deviation energy_data.sphere_stdv, dropping to zero at the sum of the two atoms' van der Waals radii.