This shader was developed to enable a 3D object in a Unity scene to do several effects. Opacity allows for it to turn transparent via a value. Desaturate removes RGB values and leaves a grayscale, brightness and darkness are input values that allow control of the RGB levels. There is also a ramp and color that can be applied over the top of the UV space. In this case, it allows for a red “ring” to appear around the edge. Built in Shader Forge for Unity.