Talk:Basic Materials/@comment-34706942-20180324151441/@comment-1191892-20191118084434

It's a render based on concept art for a submarine called the "Beluga," which looks to have just been an alternative design for the Cyclops.

https://subnautica.fandom.com/wiki/File:Pat-presley-sub03b-lorez.jpg

The model was never in the game, it was put together by a fan based on that picture.