Blend Method Parameter
The various compositing methods available for Layers in Synfig. (What compositing/blending is.) Currently these are:
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Composite
This blend method is the default option, it simply displays the content of the layer. This blend mode is similar the layer blend mode Normal Mode often found in 2D programs.
Straight
This blend method looks similar to the previous one, except that if an object is more or less transparent on the Straight mode layer, it will affect the layers underneath, making them transparent on that part.
Onto
If a layer is set to the Onto blend method, only the parts of the layer that are over a not transparent area will be visible.
Straight Onto
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Behind
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Screen
This is similar to PhotoShop - layer blend mode Screen Mode
Overlay
This is similar to PhotoShop - layer blend mode Overlay Mode
Hard Light
This is similar to PhotoShop - layer blend mode Hard Light Mode
Multiply
This is similar to PhotoShop - layer blend mode Multiply Mode
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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