i'm not sure snow crystals will show the same effect though. however, if it does work, it's pretty neat. side lighting with colored lights works best on transparent materials that don't show the effect.
Herb.... ----- Original Message ----- From: "Rob Studdert" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, February 26, 2004 8:32 PM Subject: Re: Mark "Snowflake" Cassino has some competition! :) > This method also is used to make visible stresses in transparent materials. > > http://osa.creol.ucf.edu/activities/birefringence.pdf
