1. A method for digital printing on a three-dimensional substrate, comprising the following steps: positioning a first ink jet nozzle over a region of a substrate that is of at least a first distance from the nozzle, wherein the first distance is approximately 1 cm; determining, according to print data, a first ink drop is specified for printing; propelling the first ink drop of at least a first size, from the first nozzle, to the surface of the substrate along a predictable trajectory, wherein the first size is approximately 80 pL; propelling a first plurality of droplets to the substrate in a manner similar to that of the first ink drop; and adjusting a pattern, across the first plurality of droplets, to correct for, at least in part, a variation in ink lay-down density due to sloped areas of the substrate.