An emitter material is a frosted or diffused material that scatters and emits light in all directions. This type of material is often used in windows to diffuse and distribute natural light throughout a space, while also providing some level of privacy.
Most windows are transmitter materials. A transmitter is a clear or transparent material that allows light to pass through it without significant absorption or reflection. Light from the sun changes its angle as the sun moves across the sky. Transparent windows maximize the amount of natural light entering a space, while also providing a clear view of the outside world.
Our platform is currently set up for transparent materials that allow light to pass through without diffusion. If you have a diffuse material you will need to create an approximation of its behavior by using the guidance in the Fritt Glass article.