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USER MANUAL
8.3.1
Draw modes
Draw mode determines how a layer is drawn and how it affects the layers beneath it.
The following table describes the different draw modes:
Fig. 40 -
Draw mode example images
-
Layer 2 (L2)
is always on top of
Layer 1 (L1)
.
-
The
Draw mode
of
L1
does not affect
L2
(
L1
is set to
Replace
in the following examples).
-
Changing the
Draw mode
of
Layer 2
gives different results.
Effect
Image
Description
Replace
Equation: L2
Default mode. Draw the layer on top of layers
below. The layers below the drawn layer are
not visible (except alpha channel).
Additive
Equation: L1+L2
Add the pixel values of the drawn layer to
layers below it (brighter image). White areas
in either layer stay white.
Subtract
Equation: L1-L2
Subtract the pixel values of the drawn layer
from layers below it (darker image). Black
areas on L2 leaves L1 unmodified. White
areas on L2 become black areas.
Darken
Equation: min(L1,L2)
Compare the drawn layer to layers below it.
The darker pixels of the result are drawn.
Lighten
Equation: max(L1,L2)
Compare the drawn layer to layers below it.
The brighter pixels of the result are drawn.
Multiply
Equation: L1xL2
Multiply drawn layer pixel values with layer
below it (darker image). Black areas on either
layer will result black areas. This mode is
useful when creating masks.
