I began working on this scene to learn more about making vegetation and shaders in UE4. I also took this as an opportunity to get a bit more comfortable with Substance Designer and used it to make some of the repeating materials. The foliage is modeled in Maya and the leaves and grasses are baked down to planes from highpoly models. For the rocks and trees I have experimented with a procedural material with adjustable and paintable levels of moss.