I just posted my first game art layouts from free lance work I did for Iron Crown Enterprises back in the mid nineties. I'll post more samples from time to time. Most of this stuff was for Middle Earth Role Playing but I did some work for the Rolemaster Books as well along with Silent Death space ship layouts. The art page is here:
http://iguanaslair.blogspot.com/p/game-art.html
And here is the first sample described in further detail over at the blog page. It is a Lugash orc watch tower from the Dol Guldur module: