Inputs

Foreground
Background

These are the colors, structures or textures that are blended or mixed.

Foreground Alpha [0..100%]
Background Alpha [0..100%]

Optionally, alpha channels can be added or linked to both colors.

Blend Mode

This setting defines how the Foreground and Background will be blended. The Foreground will be used as the top layer through which the Background will be hidden if Blend Mode is set to Normal. If alpha components are present, their application can be defined via the Alpha Handling setting.

The individual modes are described under Blend Modes.

Alpha Handling

If you want to include alpha components, their blending or mixing can be defined using this setting. The Alpha opton in the Mask menu must be enabled. The following options are available:

• Alpha Compositing: The alpha channels in the Foreground and Background will each be maintained entirely and define the regions of color that can interact with one another.

• Blend Mode: Tha alpha channels will be treated exactly like the color components in the Foreground and Background and are affected the same way by the Blend Mode.

• Background/Foreground: Only the alpha channel from the Background or Foreground will be read out.

• Null: Fills the output alpha channel with black.

• One: Fills the output alpha channel with white.