In 2014, I made a little mod called Stages in order to get a better grasp on worldspace creation, and to have some spots for me to take screenshots in.
This is the evolution of that mod:




What this is:

This is a project that adds new cells specifically for the purpose of taking screenshots in.

How to use:

After installing this mod and loading your game, a spell named Stage Teleport will be added to your usable spells list under the alteration category.
Use this spell to bring up the teleportation menu. The rest is self-explanatory. 

List of "Stages":

Deserted Digsite

Hedron

Pristine Courtyard

Sailors' End

Soulgleamed Plane

Venom Jungle

Ausul

REQUIREMENTS:

Dawnguard and Dragonborn DLCs

UIExtensions (or EFF)

SKSE

F.A.Q:
Will you add any extra functionality to this mod?
No. Modders are free to make patches for this mod to add extra features. I've even marked this mod as a master.

Bug Reports:

I've done all of the testing in the world, but there's still the chance I've missed something. If you see something out of place, like floating trees and objects, please submit a bug report. "Bugs" related to missing required files may be ignored.

Known Issues:

Some terrain edges are very jagged, especially some near water. I ran into a strange CK issue that resets some smoothed terrain edges in some of my worldspaces. Nothing I can do about it as far as I know. Some objects do not have LOD.