A house we are considering as open tiled showers similar to this. The tile is brown (not gray) and it (thankfully) has no window right there at the shower! I love the idea of an open tiled shower! No glass to keep clean, no curtain driving you crazy!
Not a bad tile layout scheme if we have to use more than just a x tile. Create a modern looking bathroom by mixing different shapes of floor tiles, walls tiles & mosaic bathroom tiles in the same colour. Shown here: Zenith Cinza