Reduce multiple materials down to 1 material on Static Meshes in Unreal with this tool!
See the Tutorial example here! Tutorial

Assets in the example photos are Made by Akairo. Check out his work here!

Akairo | Fab

Assets Used in Video

This plugin uses EditorScriptingUtilities and GeometryScripting

This blueprint was designed to take a static mesh with multiple materials and reduce it down to 1 material. This is achieved by scanning every material, on that mesh, making texture arrays of every texture parameter, and automatically painting and individual channel of the vertex color on that static mesh to correspond to each texture.

For detailed Instructions, please view the documentation
Documentation