It is helpful to think in terms of the following colours when visualizing a blending mode’s effect:
• The result colour is the colour resulting from the blend as determined by the formula.
• The blend colour is the colour being applied with the painting or editing tool, or the colour in the layer to which the blend mode is applied (ie the Blend layer).
• The base colour is the original colour in the image ( ie the colour resulting from all the layers below).
Blending Modes are used in two situations :-
1. Painting Tools - To specify how pixels in the image are affected by a painting or editing tool such as the Paint Brush, Healing Brush, Clone Stamp, History Brush, Gradient, and Paint Bucket Tools. (The Blur, Sharpen and Smudge Tools use a subset of the Blend Modes.)
2. Layers - To determine how the pixels in one layer interact with the pixels in the layers below it.
A Blending Mode can also be applied to an Adjustment Layer. The adjustment layer settings are first applied to the base image to create the blend layer, which is then blended with the unmodified base image.
If no adjustment is applied, then the image is blended with itself.
An adjustment layer eliminates the need to duplicate the base image (thus reducing the file size).
Blending Modes can be grouped according to the effect they have on the base image.
The Independent Modes: Normal & Dissolve.
The Darken Modes: Darken, Multiply, Colour Burn, Linear Burn, Darken Colour
The Lighten Modes: Lighten, Screen, Colour Dodge, Linear Dodge, Lighter Colour
The Contrast Modes: Overlay, Soft light, Hard light, vivid light, linear light, pin light, hard mix
The Comparative Modes: Difference, Exclusion
The HSL Modes: Hue, Saturation, Colour, Luminosity
Other Modes: Behind, Clear
Class Exercise:
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