the first reference image has the exact same layout as shown in the elevation with one exception the shower is on the right and we have the shower to the left of the tub the tile backsplash above the tub and the shower tile should be the same tile as shown in the second reference image extend that same tile as a tile wainscot at the same height as the tub backsplash the marble base board and tub deck should be in the same marble as the third reference image the floor tile should be the tile in the fourth reference image add a single pane of glass on the back tub wall above the height of the tile backsplash with the same bronze tint as the mirror in the fifth reference image the glass should cover the entire wall add a crown moulding just like the first reference image the walls and ceiling should be white