The June challenge at Paper Smooches is to use layers.  It seemed odd to me at first as I think Paper Smooches is the Poster Child for CAS cards (Clean and Simple).

Sandra has made a card that shows that you can do CAS with layers.

papersmooches.net

Supplies:

Cardstock: Stampin Up

Pattern Paper: DCWV & Craft Smith

Ink: Memento Black

Markers: Copic

Die Cut: Simon Says Stamps