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Here's a cool glass etching animation. Please see links below.

The flames are animated using 3 layers of glass, each layer a different flame shape. The top layer is the face of the graphic.

I am using an Arduino Uno to drive two TLC-5940 LED PWM driver chips to provide the random flash color color sequencing.
Each flame graphic on each glass layer is being lit with a RGB LED that is flat and close to the thickness of the glass so mounting the LED is easy and I can keep the spacing between the glass layers close.
The face is being lit with a 4" white cold cathode lamp, might change this to RGB LEDs so I can change the color on the fly.
I am working on adding a couple of LEDs to each flame graphic to brighten the flames and a overall mask to hide the ambient light coming from the LEDs.

This is not the final product but its close..

The links to the pics and video files are below.

http://pumpsdevcave.com/glassetching/an ... G_0588.MOV

http://pumpsdevcave.com/glassetching/an ... G_0584.JPG

http://pumpsdevcave.com/glassetching/an ... G_0574.JPG

http://pumpsdevcave.com/glassetching/an ... G_0573.JPG

http://pumpsdevcave.com/glassetching/an ... G_0572.JPG