It seems to me that these pictures appear on a Renderosity CD that was sold and I had at one tme;. "Best of Renderosity" or something like that.

Could be wrong, will have to check it out. If so they are easy to copy.  Still doesn't make it right.

There are many good image protection software and watermark software available. Best to use them as your pictures are easily taken without them.

See for yourself.. Type your artist name into the google search engine. Then click on the top bar under images.

I found 12 of mine.