A method, computer program product, and system. The embodiments include a method for three-dimensional printing of an object. The method provides for one or more processors to receive image data of an object to print. The one or more processors receive a position of a light-emitting robot inserted within photosensitive material. The one or more processors initiate movement of the light-emitting robot within the photosensitive material. The one or more processors control navigation of the light-emitting robot through the photosensitive material, based on continual feedback of the position of the light-emitting robot within photosensitive material and the received image data of the object to print, and the one or more processors control activation and deactivation of emitted light of the light-emitting robot, based on the image data of the object to print, wherein the emitted light of the light-emitting robot solidifies the photosensitive material.