Sunmasts are a type of structure that have been constructed in the deserts of the Taizzan Expanse within Amshan. Unique to the region, these use concentric rings of polished mirrors to direct sunlight into a central tower. The resulting temperature is more than sufficient for glassblowing, though the method is inherently more complicated and difficult than use of traditional forge. The sunmasts are especially favored by Amshani glass smiths for the creation of religious works.
Sunmasts are incredibly expensive to build and laborious to maintain, factors that have inhibited more widespread use. Most are located around the cities of Numena and Soliran.