How It works - Section 4 - Title Inside the Glass. How It works - Section 4 - Inside the Glass Solar Deflection. The darker the tint, the more solar radiation and glare are rejected, resulting in optimized light levels and temperature for occupants. Smart Layers. Multiple thin layers of metal oxide form the electrochromic coating on the inside of the glass. Electrical Voltage. When a tiny electrical voltage is applied to the glass, then ions move between layers, changing its structure, and tinting the glass.