The final result of Color Dodge mode are always range from Lower Layer value to 255. Color Dodge have the following behavior:
- If Lower layer value + upper layer value is greater than 255, the end result is always 255.
- If Upper layer value is 0(black), then the end result is always no different from lower layer value.
- For example if the lower layer value is 155, then the final result will be range from 155 - 255. From 155 to 255 there are 100 range of values. This 100 ranges of values are depend on the upper layer value. In this case, that would be 0 - 100. When upper layer value is 0, there will be no effect on lower layer value, and the effecting value will be increase as the upper layer value increase, when the upper layer value reach 100 or higher, the end result would be 255.
This mode is useful for color enhancement or special effects.
Color Dodge tends to desaturate and wash out lower layer color with upper layer color. See the blending example below:
Instead of immediately showing you how to do a cool layer mode trick that might be rarely use by you, we will explain the true mechanism working behind every layer mode. By fully understanding the fundamental of every layer mode, you will be able to apply layer mode into any problem you might run into when the time come.
Layer mode is about blending the content of two or more layers together to produce intended result. The result of one blending can be both final artistically result or intermediate result that use for further image correction or enchancement.
Layer mode blending the content of layers by calculating the Red, Green and Blue value of every pixels against its lower layer Red, Green and Blue value. Almost all layer mode do calculation on each color channel separately, that is mean upper layer Red value will be only use for calculating against lower layer Red value, and same thing happen to Green and Blue.
While most of the layer mode do calculation on RGB channel, some layer mode do use HSB(Hue, saturation and brightness) for the calculation, e.g. Hue, saturation, color and luminosity mode.