Most showers will require some sort of enclosure/door. Even showers that do not need a door usually will have glass panels. This approach makes the room appear larger than if walls were built and lets light into the shower.
Shower doors can be hinged, pivoting or sliding. Doors trimmed with metal will be less expensive than all glass doors which are typically made with 3/8 thick glass. The less metal the more critical the fit of the door.
There are a variety of textures for glass panels and doors but most popular is clear. We recommend having a coating applied to the shower side of the glass to encourage water to bead off and leave less spotting. The coating is applied and then the glass is heated to temper it.