The Production Designers who design all the spaceships, the prop guns, or bows and arrows that get sold in toy stores for decades, the Costume Designers who design all the costumes that are also sold in toy stores and in Halloween shops FOREVER, make absolutely nothing off of any of it.
The composers make money off of the music they compose. The writers make money off of the words they write. In Perpetuity. Even the Directors and Assistant Directors make money every time time a movie or TV show is aired.
But the artists who create the visuals??? Not one red cent.
Things that make you go hmmmmmmmmmm.