Moonstone Islands is a rough concept of an open level made inside UE4, which I was working on in my free time. My goal was to create an open island environment using World Machine and to set up completely dynamic lighting for a day/night cycle. All vegetation and textures were used from Quixel Megascans.
To create my landscape I used World Machine and several standard nodes like perlin noises and erosion for an initial layout map I painted. For a landscape material in UE4 I would need a splat map. For that reason I imported a custom splat map node for WM and exported all needed masks.
Landscape Material and Splat Masks
To be able to modify texture masks from my splat map inside material editor I made a Mask Modifier Function that can be found below.
Apart from masked textures I needed different layers to paint materials on top of masked textures for that reason I used a bunch of Lerp nodes for overall 6 material layers. Materials them self I packed in function to keep landscape material clean. On the screenshots below I can see the functions and material instance properties.
Light function clouds shadow
Sharpen Post Process Material
To add crisp and sharp look to all textures in the foreground I made a sharpen PP material and added it to the Global Post Process Volume. It created a nice contrast between the sharp foreground and the blurred by Gaussian depth of field background.
Mesh Distance Fields
Since I am trying to achieve a completely dynamically lit environment I decided to use Distance Field Meshes. It allowed me to get nice dynamic shadows and AO for far distances as well as proper shading for the vegetation.