The Color Add lens simulates an additive light model. Imagine shining three spotlights — one red, one blue, and one green — on a black background. Where the three spotlights combine, the result is white light. The intermediate colors are magenta, cyan, and yellow. When you create a Color Add lens, the colors of the objects beneath the lens are added to the color of the lens as if you were mixing colors of light.
You can specify a rate to control the extent of color addition. You can also choose the color you want to add to the lens.
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