by Sajiv Thomas and John Zolezzi 

CameraPanel is a low cost way to represent 2D content in 3D space.  It gives a perspective of 3D without using the true 3D element, Viewport3D.   You can set the item’s top, left, and depth position with CameraPanel’s attached properties.

<Rectangle Fill="Blue" Height="100" Width="100" blendables:CameraPanel.Left="150" blendables:CameraPanel.Top="100" blendables:CameraPanel.Depth="300"/>

*This sample has been updated to work with the Layout Mix July CTP.