1. A computer-implemented method for assisting planning or performing of neuromodulation in a patient, comprising: storing, by a computer processor, a mapping of each of a plurality of anatomical neuromodulation candidate regions to respective stimulation effect regions that are different than the plurality of anatomical neuromodulation candidate regions; receiving, by the processor, input by which one of the stimulation effect regions is selected; responsive to the input, determining, by the processor, one or more electrode neuromodulation settings estimated by the processor to produce a volume of tissue activation that at least partially encompasses a target anatomical neuromodulation candidate region, of the plurality of anatomical candidate regions, which is mapped in the stored mapping to the selected one of the plurality of stimulation effect regions; and outputting, by the processor, at least one of the one or more electrode neuromodulation settings and a display of the estimated volume of tissue activation.