Not being awkward here Kendra, but please define commercial use for us poor thick ones who have free stuff? I would think it means using something for any project in which the artist is paid. Say, for example, I'm generating a render of a set design with an actor in it for scale purposes and I use a texture I got from MalePoser.com for the actor's skin. Technically, since I'm being paid for this job, the artist who generated that skin texture should be renumerated as well as a sort of royalty for work done. Most don't really care and say as much in their read-me files (good point on that one, Kendra!), but there are some who want to be notified, like Rena and Steve, when you use something of theirs for a commercial project. It's a simple thing to do and good manners as well.