Wasn't aware of that, in that case I'll drop the subject.
My understanding is that Giants is allowed to be
mentioned (i.e. you can recommend Giants in a thread asking for a list of creature-adding mods or you can post a question about how to get Giants running) but any discussion of borrowed assets is liable to get a thread locked. That said, moderators are allowed significant leeway to interpret forum rules themselves and some moderators are quicker to lock threads than others (Telesphoros' case being a notorious example).
Mods are free... but considering the image in the mod doesn't impact the trade in the least, there really is no foul here.
It's up to the owner of the copyright to make that determination. If the owner of the copyright believes there is a foul then you'll be talking to lawyers.
The use of the image in a mod is technically no different than one printing out the same book cover and framing it for their wall...
The person framing Keith Parkinson's artwork on their wall is not distributing Keith Parkinson's artwork. Distribution is a key concept when discussing copyright.
A friend of mine makes action figures of the personalities of the Shannara universe.... They aren't for sale. ... there is no law against it if you follow the rules; which are no letting money or plagiarism cloud the intent.
In the past the fact that a defendant did not charge for a work has, more often than not, mainly affected the damages he was forced to pay when he was caught. In the past the "but I didn't charge anything" defense has not proved to be a reliable safeguard against prosecution. Again, it's up to the copyright owner. The owner of the Star Wars franchise is extremely forgiving about these matters; the owners of copyright relating to Tolkien's IP are notoriously prohibitive. We cannot generalize about this. There is no such thing as "the rules", applicable to everyone everywhere, at all times, under all conditions. If the estate of Keith Parkinson learns of your friend's activities and decides to take legal action there is not a lawyer in existence who will be able to accurately predict the outcome, should the matter go to court.
My point here is that every one of us in this thread are talking out of our backsides if we pretend we know what copyright law is. As melian said, "...while you may think you know all there is to know about IP law, you're probably wrong. Most lawyers don't." These matters are decided on a case-by-case basis. And each case is going to be different from others that have been tried in court. Copyright lawyers can offer an educated guess about the probable outcome of a case but not even a copyright lawyer can predict what will happen should such a case make it to court.
Again I quote melian: "So please think twice before mouthing off, OK?" This is excellent advice for all of us. We all need to stop pretending to be armchair lawyers.