That's really nifty.

And no, I don't think anyone plagiarized anything. Using Sittinglight's (or whoever's) combo as a base for exploration is no more (or less) unoriginal than making yet another z² + c zoom. If it produces nifty results, the more of us go poking around in its depths, the better. Each new and interesting finding from any of these systems enriches us all.

I haven't seen anything similar to this by Pauldelbrot?

I think it's a absolutely fantastic fractal, even so good that I wish it was on deviantart so I could add it to my favorites. It's got so much in it. I am amazed by how much this mimicks a forest including a path, while in the meantime it has some very mysterious elements. There's the grey which fits the burned atmosphere in the forest, and the blue fog in the distance which creates a contrast with the trees coming from the... roof? It's very surreal. It also has an atmosphere of a dark battlefield suitable for an online game with the hole in the ground and logs that form bridges. There's a lot to be seen and it all fits perfectly in this single fractal. Very well done!