I want to thank Zounds! for his response on rpg.net when I asked for sources for sand sculpting. He posted a class he designed on his blog here:  http://udan-adan.blogspot.com/2015/08/i-wrote-it-so-i-might-as-well-post-it.html

If you want beach or desert wizards that can make the lives of the PCs "interesting", you should check it out.

I mentioned The Dreams of Ruin a few months ago, a Labyrinth Lord and Mutant Future supplement for high level play. It has finally been released as a POD. You can find it as a free PDF or book here: http://www.rpgnow.com/product/152691/The-Dreams-of-Ruin