The sidewalk was modelled using Blender 2.93. A render cycle was used. The materials used are based on BSDF, which uses brown, grey, black and white base colours. The result of this design is a .blend file, .obj file, .mtl file, .fbx file, and .glb file.
BLEND (Blender, filesize: 29.3 MB), OBJ (OBJ, filesize: 6.91 MB), FBX (Autodesk FBX, filesize: 2.47 MB), GLTF (glTF, filesize: 2.82 MB)