this is a lampshade model. I made the model with the blender program. The bottom of the model is vase-like. I edited the UV map in the model.
BLEND (Blender, filesize: 1.23 MB), OBJ (OBJ, filesize: 598 KB), FBX (Autodesk FBX, filesize: 237 KB), STL (Stereolithography, filesize: 444 KB), DAE (Collada, filesize: 520 KB)