Three months ago I made a post about custom persistent world, now it evolved into Subcaverna mod. There is still a long way to all features that I want, but I like how the current result looks and feels
This is a small showcase of the same world that I shown in previous post. That world is persistent - it is created by plugin base during game startup (works both in singleplayer and server), it saves/loads chunks on disk (unlike instances) and allows to make structures inside that will not disappear on timer or after game exit.
Sadly it has only one biome, I don't know how to make multibiome system with Worldegen V2, probably that is not fully implemented in game yet
Just some simple custom rocks, wood and biome. Textures were partially made procedurally using Pixel Composer, partially painted