1. A method comprising: receiving a patient anatomy data set that describes at least one characteristic of patient tissue proximate to an electrical stimulation lead having a complex electrode array geometry implanted within a patient; receiving user input that defines stimulation parameter values; generating a stimulation field model that represents where electrical stimulation will propagate from the electrical stimulation lead based upon the patient anatomy data set and stimulation parameter values; and displaying the stimulation field model in conjunction with a representation of the electrical stimulation lead.