World composition: setting up tiled material

Excuse me for being a newbie, but i am not sure what is the best way to set up my landscape. Say that I create a World Machine map with 8 tiles that will produce 8 map files(.r16) and 8 splat maps(.bmp).
My question is: how do i set up my landscape material to include the splat maps?
Do I need to create a separate material for each Level?
Do I use material instances that attaches each splat map?(not sure how this works)
Do i create a single splat map in WM that will cover all 8 tiles?
Or am i just way off?
I have searched for an example, but have not found anything. The closest post i have found:A new, community-hosted Unreal Engine Wiki - Announcements - Unreal Engine Forums, is using slope nodes.

Any guidance will be greatly appreciated…

Same question here.
World Composition uses only 1 MATERIAL.
¿How to use 1 material/tile??
I supose importing individual landscape and assign it to a map. And load them automatically with world composition stream system.

Epic Staff answer something,… question from 2014… we are on year 2018.

:frowning: