Almost all curtain models look like motionless and fixed. But my curtain model looks like moving with wind. It may contribute to make places live. You can use it with windows or just use the curtain, as you wish. To make better render quality, I made the model with walls and floors.
All models are in the one zip file, so 163 mb means zip size. 3dm file size is 44MB, others' size are variable.
3DM (Rhinoceros 3D, filesize: 163 MB), OBJ (OBJ, filesize: 163 MB), FBX (Autodesk FBX, filesize: 163 MB), 3DS (3D Studio, filesize: 163 MB), STL (Stereolithography, filesize: 163 MB)