Landscape Material Mess up when adding maps to new Material function.

How ya all doing.

I want to be able to paint more different textures than the Grass and Rocky on I have now. I use a SlopeMap from WM, which gives me a somewhat great looking terrain.


Now I would like to add a new material (Sand) onto my Landscape Material, which I successfully have achieved.


Now like I said, it worked, so I started to play around with my new Material. (Adding Roughness, Normalmaps, basically anything) My LandscapeMaterial Texture just disappears after compiling. Here is a screenshot.


As you can see, I get the default texture setting.
What the hell am I doing now.

I might aswell upload a Screenshot of my Landscape Material.


I hope you guys can help me out.

Thanks in Advance.