We're keeping the rest of the tile in the bathroom, as well as the floor. It's old-fashioned looking, but it's clean and in excellent shape. For the shower, we've chosen a dark green tile that we think will go well with the green in the existing tile. The shower pan or tray is in place, and the green on the walls right now is some kind of moisture barrier to seal the plaster wall.
So two walls will be glass. Facing the door that opens into the bathroom we've ordered a frosted-glass panel. When you walk or look into the room, you won't be staring into the shower stall. On the left side of the photo below there will be a folding door made of clear glass, leaving a view of the vineyard through the window on the other side of the room, and letting in a lot of light.
The bench in the stall has a seat made of the same "stone resin" material as the shower pan itself. It's a Corian-type product and won't be as cold as tile to sit on, and it will be easier to keep clean. The shower pan (or tray — le receveur in French) measures one meter by one meter (39 in. x 39 in.) and the bench is 26 cm (10 in.) deep. So the area inside the shower will be just more than 13 sq. ft, compared to less than 8 sq. ft. for the old shower unit.