Felting takes many forms from sculptures to wispy scarves. The results can be soft and delicate or sharply defined as in the last three images in this screen shot of the first few images currently on my Pinterest Felting board.
Wool fiber itself is made of loosely scattered fibers. The easiest way to get sharp edges on shapes, as in the last couple images here, is to use a pre-felt. If you need a lot of it, you can buy large sheets (for a large price) but it is easy to make your own.
Pre-felt is simply fibers ( usually Merino wool) felted just enough that they will hold together so you can cut shapes from the pre-felted sheet. Because this has not been completely felted the shapes will blend in with your background fibers as you finish the felting process.
Making your own means that you can control the kinds of fibers, the thickness of the pre-felt, its textures and, most fun of all, the colors. You can use your hand felting needles, your felting machine or wet felting techniques to make the pre-felt. And if you want to get fancy, you can purchase a hand tool that needle felts a 4", 5" or 6" square at a time. ( http://felt-o-matic.blogspot.com/ ) I don't have one yet, but it is definitely on my wish list!
.... Lily Kerns
About Whisper Felting: The felting process doesn't have to give you a thick pad of uniform denseness. The results can be light and supple. Felting offers quilters a way to embellish fabric with a wide variety of textures and patterns. By felting different materials together, you can change the color. Lily will show you how to combine fibers, yarns and fabric using several different hand and machine techniques. You will make a collection of samples and three small projects. Little actual sewing is required. All levels. Read more...