Three-dimensional object shaping method and three-dimensional object shaping device

A three-dimensional object shaping device that shapes a three-dimensional object by layering a unit layer formed using a coloring material of one or more colors based on three-dimensional data including color data, the three-dimensional object shaping device comprising:

• a discharger for discharging a liquid droplet to a working surface, the discharger including a plurality of nozzles that discharge a liquid droplet for shaping the three-dimensional object;
• a relative mover for relatively moving the discharger and the working surface in at least one of a main scanning direction or a sub-scanning direction;
• and
• a control device for controlling operations of the discharger and the relative mover;
• wherein
• the control device calculates a plurality of pieces of cross-sectional slice information to use for formation of the unit layer based on the three-dimensional data, carries out a halftone process using a dither matrix on at least one part of the color data with respect to each layer of the plurality of pieces of cross-sectional slice information, carries out the halftone process of the color data so that a pattern of the dither matrix used with respect to at least two of the plurality of pieces of cross-sectional slice information differs, and controls the discharger and the relative mover to form the unit layer based on the cross-sectional slice information subjected to the halftone process.