Check out 3d Tunnel Low-poly 3D model on CGTrader for $2. High-quality mesh by CraftedIn3D: 1736 polys, 991 vertices. Textured.
SKP (Sketchup, filesize: 25.3 MB), BLEND (Blender, filesize: 28 MB), OBJ (OBJ, filesize: 153 KB), FBX (Autodesk FBX, filesize: 37 MB), MAX (Autodesk 3ds Max, filesize: 1.14 MB), GLTF (glTF, filesize: 27.1 MB), DAE (Collada, filesize: 234 KB), SKP (Sketchup, filesize: 25.3 MB), 3DS (3D Studio, filesize: 118 KB), PLY (Ply, filesize: 238 KB), TEXTURES (Textures, filesize: 130 MB), EXR (EXR, filesize: 65 MB), JPG (JPG, filesize: 65 MB), PNG (PNG, filesize: 28 MB), FBM (fbm, filesize: 36.9 MB)