The Get Alpha component extracts the alpha channel from the source image or color. The channel is extracted as a grayscale image. This is a map component, it can be located in the Channels category on the Components Bar.
Provides the source image or color from which the alpha channel will be extracted. This input can accept HDR colors.
Invert: Map Input
Inverts the extracted channel. When a map component is connected to this input, the state of the checkbox is determined separately for different image areas by the brightness level of the image supplied by that component. The brightness level of 0 to 50 corresponds to unchecked Invert, and the level of 50 to 100 corresponds to checked Invert.
