Towel created in Blender 2.74 based on Andrew Price's tutorial.
https://www.youtube.com/watch?v=PEpsN1-W-Qw
I used a photo instead of a colour and, yes, the photo is one of mine.
https://www.flickr.com/photos/jancyclops/16720068114/
I should have added a fabric texture to the edge where there is no nap. Maybe next time.