This specific 3D model, "Curtain Low-poly 3D model 12", is an asset made available by "Unknown author".
Can be downloaded at "Unknown platform" by following the link.
This specific 3D model is provided under the "Unknown license" framework.
BLEND (Blender, filesize: 38.3 MB), OBJ (OBJ, filesize: 1.16 MB), FBX (Autodesk FBX, filesize: 537 KB), GLTF (glTF, filesize: 28.1 MB), DAE (Collada, filesize: 2.32 MB)