What's so hard about the search function?

A small tutorial:
1) In "Forum(s) to search" we select "Shaders"
2) In the "Keyword" field, enter: "Depth field". Leave out "of" because it is a common word that will be in almost every post..
3) Set the date range to the maximum (3 years) so you're sure you'll find it.

There you go: http://www.coniserver.net/ubbthreads/showflat.php/Cat/0/Number/744167/page/0/fpart/1/vc/1