natural soil sand cliff Low-poly 3D model is available on CGTrader for $2. Original author: ultra3dmodels.
STL (Stereolithography, filesize: 1.62 MB), OBJ (OBJ, filesize: 1.85 MB), C4D (Cinema 4D, filesize: 1.17 MB), FBX (Autodesk FBX, filesize: 4.51 MB), JPG (JPG, filesize: 71.8 MB), BLEND (Blender, filesize: 73.6 MB)