Would you consider using art tile for your outdoor shower installs? - Digital Artwork on Porcelain Tile - TRULY ARCHIVAL
Very interesting options exist for creating digital art on porcelain tile! Virtually anything that you can paint, draw, or photograph (or license from professional artists, photographers, designers) can be transferred to and kiln-fired on porcelain tile - scaled to any size - custom waterjet cuts too. Consider this for kitchens, showers, pools, fountains, landscaping, and spas. Lots of photos of completed work at my Houzz profile: »
Throw in Some ExtrasIf you're by the beach, an outdoor shower is a welcome addition. The paving makes it easy to keep the area beneath it clean and mud free, and you'll certainly track less sand into the house.