A method of printing with a printing system, comprising: - receiving reservoir identification information corresponding to a reservoir of a printing device filled with a structural print material; - receiving an image file including information corresponding to a monochromatic image, -- wherein the image file includes a shade level for each pixel of the monochromatic image; -- wherein the shade levels in the image file take on values in a range between white and black, including a plurality of grey shade levels between white and black; - receiving a predetermined maximum height for a three-dimensional structure; - instructing the printing device to print the image file using the reservoir corresponding to the reservoir identification information; -- wherein the three-dimensional structure is formed as the printing device prints the image file, -- wherein each location on an upper surface of the three-dimensional structure has a corresponding pixel in the monochromatic image; -- wherein a height of the three-dimensional structure at each location is determined by the shade level for the corresponding pixel; -- wherein locations of the upper surface of the three-dimensional structure having the predetermined maximum height correspond to pixels in the monochromatic image with black shade levels; - characterized in that the printing device dispenses more structural print material at a first location corresponding with a first pixel having a first shade level than at a second location corresponding with a second pixel having a second shade level that is lighter than the first shade level; and - wherein: the printing device forms the three-dimensional structure by printing multiple layers of the structural print material; wherein the printing device prints an equal number of layers in the first location and in the second location; and wherein each layer printed at the second location has less thickness than each layer printed at the first location. - receiving reservoir identification information corresponding to a reservoir of a printing device filled with a structural print material; - receiving an image file including information corresponding to a monochromatic image, -- wherein the image file includes a shade level for each pixel of the monochromatic image; -- wherein the shade levels in the image file take on values in a range between white and black, including a plurality of grey shade levels between white and black; -- wherein the image file includes a shade level for each pixel of the monochromatic image; -- wherein the shade levels in the image file take on values in a range between white and black, including a plurality of grey shade levels between white and black; - receiving a predetermined maximum height for a three-dimensional structure; - instructing the printing device to print the image file using the reservoir corresponding to the reservoir identification information; -- wherein the three-dimensional structure is formed as the printing device prints the image file, -- wherein each location on an upper surface of the three-dimensional structure has a corresponding pixel in the monochromatic image; -- wherein a height of the three-dimensional structure at each location is determined by the shade level for the corresponding pixel; -- wherein locations of the upper surface of the three-dimensional structure having the predetermined maximum height correspond to pixels in the monochromatic image with black shade levels; - characterized in that the printing device dispenses more structural print material at a first location corresponding with a first pixel having a first shade level than at a second location corresponding with a second pixel having a second shade level that is lighter than the first shade level; and -- wherein the three-dimensional structure is formed as the printing device prints the image file, -- wherein each location on an upper surface of the three-dimensional structure has a corresponding pixel in the monochromatic image; -- wherein a height of the three-dimensional structure at each location is determined by the shade level for the corresponding pixel; -- wherein locations of the upper surface of the three-dimensional structure having the predetermined maximum height correspond to pixels in the monochromatic image with black shade levels; - characterized in that the printing device dispenses more structural print material at a first location corresponding with a first pixel having a first shade level than at a second location corresponding with a second pixel having a second shade level that is lighter than the first shade level; and - wherein: the printing device forms the three-dimensional structure by printing multiple layers of the structural print material; wherein the printing device prints an equal number of layers in the first location and in the second location; and wherein each layer printed at the second location has less thickness than each layer printed at the first location. the printing device forms the three-dimensional structure by printing multiple layers of the structural print material; wherein the printing device prints an equal number of layers in the first location and in the second location; and wherein each layer printed at the second location has less thickness than each layer printed at the first location.