There is no standard way of doing it, and normalised velocity clamping has not been documented anywhere in the published literature yet, but logically it makes sense to normalise without multiplying by the Vmax parameter: the whole point of clamping is making sure velocities don't explode. I.e., we care for the upper bound more than for the lower bound. Maybe we can implement another version of normalised clamping where the velocity vector is multiplied by Vmax, but I think this version should also stay. In this case, the Vmax parameter is more of a sensitivity threshold than anything else.