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Blend modes
Use blend modes to determine how layers are composited
together. Create complex multi-layered textures. Choose
from Normal, Multiply, Add, and Screen. Apply them
and experiment without the fear of permanently altering
your composition.
When layers are combined, the results can vary. Change
the order and experiment with the settings to achieve the
result you want.
Multiply layers
Use Multiply to produce an overall darkening effect to the
layer appearance.
When using Multiply, the value for each pixel in the layer
is darkened by a value equal to or greater than the value of
pixels on other layers occupying the same location in the
layer stack. It produces a similar effect to combining one
or more photographic transparencies together and looking
through them.
Add layers
Use Add to lighten the overall composition, similar to
Screen, but in a more extreme manner.
When using Add, each pixel is brightened by a value
equal to or lesser than the value of pixels on other layers
occupying the same location in the layer stack. This is
applied as a linear calculation.
Screen layers
Use Screen to produce an overall lightening effect to the
composition.
When using Screen, each pixel in the layer is brightened
by a value equal to or lesser than the value of pixels on
other layers occupying the same location in the layer stack.
It produces an effect opposite to that of Multiply.