I stitched the raised padded stitches over and over until I got them the way I wanted. The Venetian Rose is made of six petals of detached button hole stitch. I must have gone done the petals several times as well. It takes practice to get the tension of the petals right so that they all end up being the same size (or at least as close to the same size as I can get them).
Below is a picture of the whole thing so far: