In the example above I digitized a simple square shape, I then changed the density type to a convex. This varies the density so that it is less dense in the center and more dense at the ends. I then copied and pasted the square and turned it on its side. The next step was to place exactly on top of my first square. As you can see this result in a softening of the square shape making it look three dimentional and rounded. This ia a great way to get dimension in your designs while at the same time keeping your stitch count down.