2

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In the composition window, create a new solid color layer.

three

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Search for "saber" in effects and presets.

four

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Double click to add a special effect.

five

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Set saber parameters.

six

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Then drag a heart-shaped material, close the black layer and show the love layer.

seven

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CRTL+SHIFT+C do a pre-synthesis.

eight

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Under Layers, click Auto Trace.

nine

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Expand the layer mask, copy the mask path and paste it on the solid color layer.

10

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Finally, let's look at the final effect.