making materials

hello again ,
Ive been trying to replicate some materials, by importing the statics and the textures(cant import the materials somehow)
then copy-pasted there blueprint and pasted it into mine, then maked the links and fill in the textures.
most of the times it goes well, but with this guys “kitedemo from UE4” im having problems…
The idea is, he has nice new trees, foliage and flowers even, all realistic.
So I duplicate his blueprints for making materials with masks…
flowers i rlly dont get working :frowning: