I enjoy drawing, and a lot of answers to questions I've seen or posted myself have given me some cool ideas. I've been considering posting art online, and I've been thinking about the ethics of posting art based on other people's answers.
It's one thing to post something based on my hexapodal bats, because it's a design I was already working on and I asked a question to help ask about its feasibility.
I think it would be another thing to post art based on the answer for my Anatomically Correct Scylla question, since that isn't a design that I came up with.
To be clear, I have no intent of making money from my art right now. I would definitely not monetize something based on someone else's idea, but I'd be worried that someone would think that I came up with the design when I really didn't.
I think that if I ever did such a thing, I'd probably link back to the question and probably leave a comment to the answer where the idea came from.
Basically, when would it be okay to post art based on Stack Exchange questions/answers?