How Does It Work?
The three different types of LIGHTEN component differ slightly in their function.
The color LIGHTEN component increases the value (HSV) of the Background texture based on the Mask parameter. The percent LIGHTEN component simply increases (lightens) the Background percent
texture. The bump LIGHTEN component increases the scale of the Background bump texture up to a maximum of twice the original bump scale.
A Mask value of 0% will have no effect while a Mask value of 100% will have the maximum effect.
Note that the percent LIGHTEN component and the percent Fade component are functionally the same.
Hints!
Keep in mind that the Mask parameter is linkable. Using another texture as a Mask, especially noise, is a good way to simulate wear and weathering by unevenly lightening areas of a Background texture.
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