I'm gonna wait for Steam version
Free work is ok if it's not-commercical project, such as modding for game. If it's commercical and they're going to make money off your work then it's unfair.
Winter by Niels PRAYER
Winter is a short project by motion designer, director and art director Niels PRAYER that shows the flow of this magnificent time of the year. It demonstrates water that freezes over, falling snowflakes and a snow covered forest. Winter was created with Houdini, Mantra and After Effect.
© Niels PRAYER, 2016 Vimeo Link