Blend Mode Effects

    Select a blend mode from the left list. Only one blend mode can be applied at a time. The overall appearance can depend on the layer underneath the current layer with the effect.

    Consider the following movie structure: a movie clip (mc1) with another movie clip (alpha_mc) and a background shape inside

        - mc1 movie clip
          +- alpha_mc movie clip
          +- background shape

    You can set the blend mode for alpha_mc to Alpha or Erase and set the blend mode for mc1 to Layer. In case of the Alpha blend mode, the alpha values of alpha_mc are used for the background shape making it possible to create an alpha mask without scripting. Erase blend mode does the same but with all alpha values of alpha_mc inverted.