This thread reminds me of something my late sister once said about (I think it was) Barlow's Guide to Extraterrestrials
. Her impossible (yet strangely practical) thought was that it would have been better if the artist had never seen an Earth animal before. Her comments about how the artist would borrow a piece of a gorilla here, a piece of zebra there was unimaginative. I can't really argue with that...even though it's impossible to achieve!