Masking is such a neat way to add depth to your card without adding a lot of layers. Last week I did a class at our local scrapbook store and had a lot of fun preparing for the class. We did three cards. The first two were with the SU set called "Flower Shop".
The first card was very simple -- The first step is to stamp your flower. Make a mask by stamping the image on a post-it note and cutting it out. Place the mask over the flower on your card. Stamp the greenery. Leaving your mask in place, spritz over the stamped area using a marker and the Tim Holtz air brush. Add your sentiment, mount the image on your card and you are all done.
The second card is done using the same principles just with more detail. The center flower is stamped and covered with a mask. The flowers on each side are then stamped. The mask is moved around so that the leaves and twigs can be stamped around each flower. To complete the image, I colored around all the flowers using a lite gray Tombow marker (N95). This step really makes the flowers stand out. The last steps were to stamp the sentiment and soften the white card stock by using a stencil and some sponging. I love the dimensional effect that is achieved this way.