A method for growing a crystal includes steps of providing a 3D framework with an collection of solid structures and flowing a liquid starting material around and between individual ones of the solid structures of the 3D framework. Through use of calibrated corrective coils, magnetic field lines can be manipulated to improve uniformity and image quality. The present invention allows a user to use a region directly as an input argument for a part body modeling operation as long as a sheet body is applicable as a modeling input argument. The container is recharged with one or more additional samples of coke and reused in another conventional coking operation.