I'm looking for a temporary solution that doesn't cost a lot of any money. I have basic construction skills (about the average home owner), so anything too complicated to install isn't a good option.
The shower has a tub. The required walls measure 60*30*67 (LwH) (67 inches from tub to ceiling, not floor to ceiling). The tub is 15 inches tall.
Again, I'm looking for the cheapest solution that's waterproof, I don't care how it looks.