AC: Worldbuilder is a Modpck created to build Worlds. 

It contains many decoration and cosmetics mods to build a good-looking world.

But also some Tech-mods are included to play Survival or to build working factories.

The pack is designed to play in Creative mode or in the Designer mode from Orbis, but you can also play in Survival.

If you play on a Server, FTB Utilities is also included to protect your buildings.