This effect adds a full-layer vertical gradient to the scene, then additively blends it with all other elements on the layer. Additive blending adds the pixel values of the gradient and the layer, making the result lighter. White areas do not change, and black areas are the same color as the gradient. In the image below, the effect is applied in the right picture.

Properties

Usage

In the inspector palette, select the top and bottom colors of the gradient.