When choosing the patterned topstitch, a normal fill (tatami) is the default, however you can adjust the pattern to have needle lands that form texture. Each pattern can have its stitch properties adjusted. Stitch Length in the pattern relates to the size of the pattern that is made. If you make your pattern too wide, it will not be visible unless the shape itself is wide enough. To make a fill appear smoother you can also add randomness to the needle lands for a Tatami fill.
Note: There is also an option of using fill pattern “None” which will emulate a satin. This is for very small areas, where the stitches will not be excessively long, or for fills that are only going to be carved.