1. A system to change an appearance of a region of skin of a person, the system comprising: at least one image generating element configured to scan the region of the skin to generate digital images of the region of the skin; at least one reflectance modifying agent application element, the reflectance modifying agent application element being operable to apply one or more reflectance modifying agents to frexels of the region of the skin of the person; and a computing device that is coupled to the at least one image generating element and to the at least one reflectance modifying agent application element, the computing device being operable to perform operations comprising: obtaining a desired image associated with the region of the skin depicting one or more model features of the region of the skin of the person, instructing the at least one image generating element to scan the region of the skin to generate a first image depicting current features of the region of the skin, retrieving from the at least one image generating element the first image, comparing the desired image to the first image to determine a difference between a plurality of frexels within the first image and the desired image, and instructing the at least one reflectance modifying agent application element, to apply the reflectance modifying agents to at least one of the plurality of frexels based on the difference, to emulate the one or more model features of the desired image within the region of the skin of the person.