User Guide

Table Of Contents
112 Corel Painter User Guide
Mapping a Gradient to Luminance in an Image
You can map a gradient to an existing image, replacing an image’s colors with those of
the gradient. This effect applies gradient colors to the pixels of the image, based on
their luminance values.
Corel Painter allows you to apply a gradient based on the luminance value of existing colors.
To express a gradient in an image
1 Open the image you want to use.
Select part of the image, or use the entire image.
2 Choose Window menu > Library Palettes > Show Gradients to display the
Gradients palette.
3 Select a gradient.
4 Click the palette menu arrow, and choose Express in Image.
5 In the Express in Image dialog box, adjust the Bias slider to define how the
gradient is mapped.
Corel Painter replaces the colors in the image with the colors in the gradient, based
on matching luminance.