@girsempa and kjpweb;
Your idea of getting Renderosity to help you in some way in the form of a letter....is a good one....but I sincerely doubt that it will ever happen.  I don't think Rendo in any way wants to get involved...they will say they are just providing an avenue for you to host your images...if your images get ripped, it is not their problem.  And I dare suggest that the last thing Rendo wants is to get involved in any sort of litigation.....

Another point....remember Rendo wants the traffic here....they will never admit it but, that traffic includes rippers.  If they start putting watermarks on the uploads, a lot of folks won't come here because there's nothing to steal.....

Sorry for my rant...but I've been through this before, I have asked for changes and nothing has happened.  About the only thing you can do is consider whether or not you want to continue uploading...or upload with your own watermark that covers the entire image.

In youth, we learn....with age, we understand.