First of all, I used an existing material (LS-grass green) and made a duplicate, renaming it Moon. I then selected my custom image from my library ('moon'-ish texture) and played about with the sizes and tiling options until I was happy with it.
Now when I apply it to the mesh in 3D view, it works, but when I try to create a render, it's still showing as the grass.
Yes. I have intentionally dropped some information, just to not scare you...
I think you did play with internal rendering engine settings, then done the rendering with LightWorks.
Materials have separate setting for LightWorks and the internal engine (in the same window). The preview is is made with the engine chosen in a menu, next to it.
Choose LightWorks, there, then go down and click on "Match with internal engine"
--Roberto Corona-- www.archiradar.com
AC18 - ITA full on Win10