Blend Method Parameter
From Synfig Studio :: Documentation
The various compositing methods available for Layers in Synfig. (What compositing/blending is.) Currently these are:
Contents
Composite
This blend method is the default option. This blend mode is similar to PhotoShop - layer blend mode Normal Mode
Straight
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Onto
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Straight Onto
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Behind
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Screen
This is similar to PhotoShop - layer blend mode Screen Mode
Overlay
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Hard Light
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Multiply
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Divide
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Add
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Subtract
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Difference
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Brighten
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Darken
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Color
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Hue
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Saturation
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Luminance
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Alpha over
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