Okay, this is one of my favourite pieces of art, "The Great Red Dragon" by Keith Parkinson:
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You'll notice that there's an incredible amount of detail here, and obviously that detail would have taken many, many hours to draw, especially since it was done by hand. If someone wanted to create a piece of art inspired by this, they would no doubt have to draw the dragon themselves to get the pose and appearance just right, to properly convey the menace and danger the dragon poses. However, I don't see any reason that same person wouldn't consider using an AI to help with drawing the loot in front of the dragon, or for drawing the texture or background in the caverns behind the dragon. There's a lot of work there and if we've gone from lumpy, misshapen lions to "oh, the shadows and perspective lines are wrong" in less than three years, I have no doubt that AI art in the near future is going to be able to do stuff like rock textures or loot, if it can't do it already.