# How exactly does world composition work? **URL:** \ **Category:** World Creation\ **Tags:** sublevel, maps, unreal-engine, question, World-Composition\ **Created:** [June 27, 2020, 2:57pm UTC](https://forums.unrealengine.com/t/how-exactly-does-world-composition-work/467337 "2020-06-27T14:57:27Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![razmaz51](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/razmaz51/32/710746_2.png) [@razmaz51](https://forums.unrealengine.com/u/razmaz51)\ **Post date:** [June 27, 2020, 2:57pm UTC](https://forums.unrealengine.com/t/how-exactly-does-world-composition-work/467337/1 "2020-06-27T14:57:27Z")
I still don’t quite understand how this all works. I used level splitter to split about 8k map.This creates a split level template and 9 sublevels and maps in a folder, Then enable world composition. When the split template is loaded it has like 9 subdivided squares , but the map is just black. Only when i load my regular map does the landscape appear again lit and normal. But then there is only one persistant level. So how do i work with this ? after the level or landscape split, Am i supposed to then load the group of levels or the split level template and work build my level from there? or would i again load my regular map and continue building and saving there? Or is it such that if i have the 9 level sections , i can only select one (or load that one) and build and save on that part of the map. I mean after the split , is my normal map not used at all anymore?(that is , the map i originally split?) ---
**Author:** ![razmaz51](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/razmaz51/32/710746_2.png) [@razmaz51](https://forums.unrealengine.com/u/razmaz51)\ **Post date:** [July 2, 2020, 3:31am UTC](https://forums.unrealengine.com/t/how-exactly-does-world-composition-work/467337/2 "2020-07-02T03:31:34Z")
Does anyone know about this?