Here's a video on how I made a digitally designed shirt with fabric printing. I used Marvelous Designer for the 3D CAD file and the fabric pattern. The custom avatar was created based
Step 1: buy fabric Step 2: LASER!!!!! pew pew Step 3: Sew it up.
Jenny from Caret Dash Caret made a blog post about using Blender to generate sewing patterns for a stuffed animal. Another friend once showed me how she used Blender to generate apparel patterns.