Corel Painter Help | Working with posterize using color set

Quick links to procedures on this page:

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To use posterize using color set to adjust color levels

Working with posterize using color set

You can use the Posterize Using Color Set option to force your image to use the default color set. Posterize Using Color Set can help make colors in your resulting image ready for delivery to the web — without a lot of dithering or shifting of colors.

Posterizing means adjusting the number of color levels an image contains. Corel Painter can automatically constrain all the colors in your image to a web-safe, 216-color palette. Although the Posterize Using Color Set option is not designed to be a highly sophisticated method of reducing color (it offers you no control over exactly how color reduction is performed), Posterize Using Color Set can be a real time-saver.

In addition, you can constrain the colors you use to the default or another Corel Painter web-safe palette, utilize new web-safe single color brushes and keep the number of colors in your image to a minimum.

It’s important to note that exporting to GIF format can compromise the color set values used when Posterize Using Color Set has been performed. For best results in those cases:

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First, save your reduced-color image in a 24-bit format, like Windows Bitmap, TIFF, or PICT. This maintains the benefits of defining web-safe colors in Corel Painter.

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Next, open the image in a tool that supports indexed color to save the GIF — one that offers "constrain to color set" features.

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Finally, save the image to GIF format. The web-safe colors from Corel Painter are maintained and your image is ready to go right on the web.

To use posterize using color set to adjust color levels

Select an area of your image you want affected or select nothing if you want the entire image affected.

Make sure the proper color set is active.

Select Effects

Tonal Control

Posterize Using Color Set.

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