Four sections excluding the door. I try to limit my use of curved glass as most homeowners don't find it as a good value. Also, there are size limitations for not only maximums, but minimums as well. Obviously, as the length increases and width decreases, you lose structural integrity and risk warping during the tempering process. If you find yourself with a similar configuration as the one above, consult with a frameless shower door expert during the planning stage.

One side of my shower (by the tub) is exactly the same - I have explored the curved glass with a couple of frameless companies - it seems like the multiple piece solution is more economical and structurally sound. Thank you so much for taking the time to answer!