Brushify is a modular approach to building environments in Unreal Engine. With a multi-layer landscape auto shader (paint different biomes, grass, desert, snow, beach etc), alpha brushes, high resolution meshes and 8k textures.
Optimized for VR. Landscape material is only 178 instructions.
It can paint multiple auto-material layers each of them automatically textured with their own Slope and Cover (for snow). They also have 3 levels of detail: Global, Macro and Detail.