Blending is how a top layer mixes with the layer(s) below it in a stack of layers.
This is the standard blend mode, which uses the top layer alone. There is no color mixed with the layers beneath the top
in this mode random pixels are taken from the lop layer and the lower layer(s). If the opacity if top layer is greater than of
the lower layer(s) most pixels will be taken form the top layer. Is it low, then more pixel of the lower layer(s) will be taken.
In this blend mode, each pixel of the top layer is multiplied with the corresponding pixel of the lower layer. The opposite of
Multiply is Screen.
Black (0): 0 * 0 = 0
White (1): 1 * 1 = 1
Gray (0.5): 0.5 * 0.5 = 0.25
Multiplying will result in darker images. Alternatively, Curves or Levels can be used to get the same result.
In this mode the values of the pixels are inverted, multiplied and then inverted again. This will result in a brighter picture.
Black (0): 1 - (1 - 0)(1 - 0) = 1 - 1 = 0
White (1) : 1 - (1 - 1)(1 - 1) = 1 - 0 = 1
Gray (0.5): 1 - (1 - 0.5)(1 - 0.5) = 1 - 0.25 = 0.75
Screen will result in brighter pictures.
In below examples three columns (0%, red and 100% black) are covered with a 50% gray rectangle to reveal the effect of
common blend modes. Note that the effect of blend modes largely depend on the images that are blended together.
WEBREALISATIE: MARTINVANPELT VORMGEVING & DTP