How new is this engine? It was renamed to "Castle Game Engine" (from "Kambi VRML Game Engine") in 2011. Version 1.0.0 was released in 2007. Not sure if there were even older releases?

https://castle-engine.io/old_news.php?id=2011-8-22-engine_re...

https://sourceforge.net/projects/vrmlengine/files/kambi_vrml...