It's not just a shadow cast over the swatch. This is the same stitch pattern that you saw yesterday in the Caron Felt it. It has a great landscape type feel, don't you think? The Cartwheel, before felting, does have an inconsistent width to it, it gets thicker then thinner. Part of it's appeal!
Chief starts preschool this morning, if I have more time later, I'll try to write more.