In order to control smoothness depending on accumulation of a pigment ink in the multi-pass printing, an information processing apparatus for an image forming apparatus that forms an image on the same area in a print medium by a plurality of printing scans with the same pigment ink, the information processing apparatus comprises an input unit that receives inputs of image data and a target gloss level; a storage unit that stores a plurality of pattern sets including a recording pattern for each of the printing scans; and a generation unit that generates pattern data corresponding to the recording patterns by selectively using the pattern sets based on the image data and the target gloss level; wherein at least one of the plurality of pattern sets has a different thinning ratio in the recording pattern for each of the printing scans on the same area.