Name

The shader’s name. Enter any name you like, or leave the default.

Light List

Pick Item: Lets you define a light in your scene that will be used to compute the fast lens effect.

Remove Selected: Lets you remove a selected light from the light list. Once removed, the light will no longer influence the effect created by the shader.

Render Flare Only

Renders only the flare on a black background. Saves rendering time and makes image composition easier later on.

Safe Overlay

Takes the underlying color into account and tries to ensure that the result does not exceed the maximum color intensity. If both the rendered flares and the underlying scene do not exceed this intensity, the result is guaranteed not to exceed either.

Saturation Multiplier

Controls the intensity of the flare colors.

At 1, the flare changes to a gray scale. Very useful for defining the “dazzle” of a flare.

Brightness

Defines the scene’s luminance.

Lens Guard Margin

Defines a rectangle around the view plane with the width equal to the margin. The flare intensity falls off linearly within this region. This parameter blocks out direct rays from light sources outside the view angle. In screen space, this means that light(s) outside the view area should not cause lens effects. In reality, a lens guard isn’t perfect, and when a light is nearly within view it causes lens effects.

Focus Pull

Allows a lens flare to be animated. The effect’s individual components rotate and translate to simulate the realignment of the camera optics. You can also use this parameter to select a specific configuration in the flare pattern.