There are many options when it comes to glass. A traditional approach is to use beveled clear glass, but other choices include textured and obscured glass, as well as insulated and Low-E coated glass. For a truly unique door, handcrafted art glass is available from Theodore Ellison Designs.
When designing a door that will have custom art glass, Ted Ellison and I work closely in order to create a cohesive design, where elements from one flow over into the other.
Below are just a few motifs from his portfolio of designs, and more can be seen at his website here: