Overview - What is "Sheer Abstractions"?
This is a "Sticker Pack" that is accessable from your "Messages" application.
Captured here are hundreds of gossamer patterns to adorn your thoughts and enhance the mood as you chat with friends. These warmly colored patterns, from simple to complex, are partly transparent to allow your words (or other stickers) to playfully hide or show through, adding a stained glass sparkle to your conversations.
As you drag these stickers into place, you can pinch/zoom/rotate them as you place them.