Extending a earlier pen (http://codepen.io/nw/pen/VYdXee) to display the elevation of material elements (http://www.google.com/design/spec/what-is-material/elevation-shadows.html#elevation-shadows-elevation-android-).
Note: the elevation is exaggerated - change the $elevationScaleFactor variable in the SCSS to 1 for more accurate values.
Forked from Nathaniel Watson's Pen Material Elevation Illustration.
A Pen by Michael Corrado on CodePen.