Nice site. Their faq made me a little dizzy, but maybe it's the norm. I'm just a hobbyist. I got so frustrated with texture copyright issues I ended up buying Genetica Pro 2 from spiralgraphics.biz, a terrific app for making your own textures with no copyright issues. It's become one of my favorite tools. If you decide to try the free Wood Workshop, or to buy the full version, I'd strongly suggest reading all the documentation. It's well written and easy to follow. I was having fun just 'spinning dials' but after reading the docs I can generate what I want a lot more efficiently.