BlendMode

Blend modes control how overlapping pixels are blended together, similar to layers in Photoshop.

Value	Description
alpha	Normal blending where the alpha value controls how the colors are blended.
add	The incoming pixel color is added to the destination pixel color.
subtract	The incoming pixel color is subtracted from the destination pixel color.
multiply	The color channels from the two pixel values are multiplied together to produce a result.
lighten	The maximum value from each color channel is used, resulting in a lightening effect.
darken	The minimum value from each color channel is used, resulting in a darkening effect.
screen	The opposite of multiply: The pixel values are inverted, multiplied, and inverted again, resulting in a lightening effect.

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