GroundTerrain (groundMaterials 1.0.4): put this beside the engine's `Terrain` component on a landscape painted with groundMaterials surfaces, and the ground is shaded with each layer's own roughness. local e = entity.spawn("Landscape") e.component.add("Terrain", { terrain = myLandscape }) e.component.add("GroundTerrain", {}) Why it is needed: the Terrain component builds its splat surface with a fixed `smoothness` of 0.05, so every layer reads as roughness 0.95-1 whatever its mask says, and wet mud, wet sand and ice would look as dull as dry dirt and ash. This component builds the same engine surface (`terrainSurface.forLandscape`) with `smoothness = 1`, so roughness is exactly each layer's own (1 - the mask's smoothness channel), and puts it on the landscape's Model. It rebuilds whenever the Terrain rebuilds its ground (a re-bake, a reload). Nothing is shared over the network: every peer builds the same surface for itself, because every peer runs the scene's own Terrain and this component beside it.