Low-poly indoor pool in blender.
(Modelled using a referrence immage).
I haven't tested the other file formats so the best option to download is the .blendComment below for reports if it cannot open the file.
Enjoy the indoor pool!
OBJ (OBJ, filesize: 5.14 MB), BLEND (Blender, filesize: 7.4 MB), FBX (Autodesk FBX, filesize: 2.58 MB)