I know quilting isn't exactly the medium of choice for this crowd, but I also know the people on this site appreciate a gifted artist when they see one, regardless of the artist's medium. In that spirit, take a look at the work of Caryl Bryer Fallert. She is phenomenal.
Gallery of Quilt Art by Caryl Bryer Fallert
She even explains her process for some of them:
Feather Study #30 © 2007 Quilt Art by Caryl Bryer Fallert
Migration #2