Implementation

• Modeling a Canyon and Rocks in Blender.
• Importing FBX Static Meshes in Unreal Engine.
• Setting up the Scene in Unreal Engine.
• Directional Light, Exponential Height Fog, Sky Atmosphere and Sky Light.
• Post Processing Volume to tweak down the Auto Exposure limits.
• Implementing a basic material using Base Color, Roughness, Normal, Displacement and Ambient Occlusion.
• Triplanar Projection using two channels at a time from the current Vertex Normal.
• Blending Triplanar Projections by masking with the Absolute Magnitude of the corresponding Normal Coordinate.
• Material Function to extract the Sub Graph for the Triplanar Projection, to reuse in the rest of the textures of the Material.
• Material Instances to have different instances of Rocks, using the same base Material.
• Subsurface Scattering Material for the Snow.
• Using the Make Material Attributes Node to output whole Material attributes from the Material Functions for Rock and Snow.
• Masking the Snow using a Texture and Normal Orientation, to just render snow on the top of the meshes.
• Height Lerp to make the mask more natural.
• Blend Material Attributes to blend whole material attributes given the current mask value between Rock and Snow.