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Sarah814

: Alpha channels and effects I tried to apply an effect to a composition, but the effect had been applied to the whole composition and not to the contents of the composition. This composition

@Sarah814

Posted in: #AdobeAfterEffects #Alpha #Layers

I tried to apply an effect to a composition, but the effect had been applied to the whole composition and not to the contents of the composition. This composition consisted of animated shape layers, an adjustment layer and a rectangle background layer. When I removed this background layer, the effect had been applied to the composition contents.

What is the role of the alpha channel in applying the effects, and why hadn't the effect been applied until I removed this layer?


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@Rivera951

In the bottom screenshot, the shadow was applied to the bounding box of the whole group. In the top screenshot, it is applied to individual objects. That is a typical behavior.

I think you were thinking that you could select all objects and apply a shadow and that shadow would be applied to each individual object, but instead it was applied to the entire selected group of objects. To avoid that, select an object individually and apply a shadow, then select the next object individually and apply a shadow, and so on.

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