Somniscape

Somniscape adds a dimension that can be accessed by placing a Shard of Dreams onto a Dreamrock Keystone. When in The Somniscape, you can play in creative on your survival world! Useful for designing builds and redstone contraptions to be built in your survival world without having to change worlds. This mod switches out your inventory when travelling to and from the Somniscape, keeping your survival progression intact!

With the Create Mod installed, you can build and design to your hearts desire in The Somniscape and use a schematicannon to place your creations in survival.
 

Below are the crafting recipes to make a Somniscape Portal:

Known issues:
-Advancements can be made in creative mode when in the Somniscape Dimension.

-The mod is currently incompatible with mods that add additional inventory slots that are not swapped when travelling to The Somniscape. In the case of Curios, the Curios inventory is wiped when travelling to and from Somniscape.

-Some mods that add cross-dimensional storage access may allow for cheats and interfere with the inventory separation of the Somniscape

-Dying in the Somniscape and respawning in another dimension will break the inventory swap system, not a huge problem since this should not be possible unless cheats are enabled.

Other:
-Credit to NWT Mcreator for designing the inventory swapping system used here: https://www.youtube.com/watch?v=Q_93v1UJQ-o

-This mod is free to be used in modpacks.

-I will port to newer versions in the near future