Veloren started as a clone, or perhaps rather spiritual continuation, of Cube World: https://en.wikipedia.org/wiki/Cube_World
Cube World was hyped quite a bit, particularly because the solo dev made huge promises. Then he released an Alpha build, made a bunch of money from that and went into radio silence.
Veloren basically set out to build the game, that Cube World was promised to be. And well, they've long surpassed what was in that Alpha build.


To my knowledge, they're entirely separate engines...