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Rendering a scene often involves drawing layers of objects that overlap each other. Blending determines how two overlapping pixels are combined in the final image that is rendered to the screen. Chickadee provides the following blend modes:
replace
Use the latest color, ignoring all others.
alpha
Blend pixels according to the values of their alpha channels. This is
the most commonly used blend mode and thus is Chickadee’s default
mode.
add
Add all pixel color values together. The more colors blended
together, the more white the final color becomes.
subtract
Subtract all pixel color values. The more colors blended together,
the more black the final color becomes.
multiply
darken
lighten
screen