Tile, Layout, and the Shape of the Enclosure
Large-format tile with fewer grout lines, or a mosaic floor for grip and drainage. Full-height walls, a wet-room layout with the tub inside the glass, or a corner enclosure that gives the floor space back. The footprint is measured off your actual walls, so an out-of-square older bathroom gets a shower that fits it rather than filler strips hiding the gap.
