Perhaps you mean a Trapunto style pattern by the word 'fluffy"? If you want something to puff up more than the background, you do very dense stippling in the background. If you want it to puff up more, you put two layers of batting (or more) under the bit you want to puff out. You sew an outline stitch around the shape and then cut away the excess batting on the back of the quilt. Then you sandwich the quilt in the normal way, with a full piece of batting inside the quilt top and backing.You then stipple around the shape and the double - layered areas will puff out distinctly.You also need to use a batting that will not flatten out, but keep its "puff" and be resilient.