A 3D content adjustment system includes a processor. When a target WGV opening is equal to or smaller than a threshold opening, a given opening is added to or subtracted from the target WGV opening while the WGV is controlled to perform an openingclosing operation based on the target WGV opening. In one embodiment of the invention, the optimized device utilizes a rectangular cell array with an elongation ratio in the range of 53\u201373, with a ratio of 53 being preferred, and a cell orientation at 45\xb0 with respect to the wafer flat on a 100 wafer.