James,
Go for it and be creative! What I do is find a picture of the game animal I want to build and then free hand sketch onto the back side of the carpet big enough to get a front and back side. Cut out using a box cutter all of the outline (legs, belly, neck, etc...) on one side leaving the line of the back uncut (see hog outline below)
With one side cut out leaving the back attached to the other side piece of carpet flip it over and trace out and cut the other side.
You should now have two sides joined at the back. Now stick together using 18-20 gauge wire while stuffing with more scrap carpet placing though body to simulate muscles and building up the kill zone areas. Then I recommend using expanding foam to fill out kill zone and other areas for realistic looks.
Spray paint and place. I use the wire also run though the back to hang between trees.