Using Multiple Landscape Materials for Landscape Weight Import

Okay, So I am kind of lost. I am trying to Import a world composition using the Tiled Import Levels tool. However, I have made a Material that has a basic texture combination using the Layer Weights function and it all seems to work fine, however my textures are extremely tiled and very noticeable. I am trying to setup multiple materials that have very detailed settings that removes the “Tiled” appearance, however when I import the tiled levels it doesn’t give me an option to use more than one material… Any Ideas? (I Exported my terrain from world machine using multiples height maps to determine what material or weight should be assigned to what part of the terrain)