yes.   bill was the first to post the simplified fresnel shader here.

[http://www.renderosity.com/mod/forumpro/showthread.php?message_id=3894367&ebot_calc_page#message_3894367](http://www.renderosity.com/mod/forumpro/showthread.php?message_id=3894367&ebot_calc_page#message_3894367 "don't miss "liz & dick" with lohan. ")