Rendering a color wheel You can fill a selection with a radial blend of colors by choosing Image > Filter > Render > Wheel. The rendered effect looks like the color wheel preview in the Hue/Saturation dialog box. The Wheel filter works with paint objects in RGB Color and CMYK Color. Unless you make a selection in the image, the Wheel filter replaces the entire image. If you want to apply a translucent wheel effect, fol- low the steps for the procedure “Applying Clouds filter to selections” on page 35.708, but in the seventh step, choose the Wheel command. Applying Clouds filter to selections 1    With a paint object in edit mode, choose Image > Show Channels to open the Channels palette. 2    Select a color channel that shows the most contrast. 3    Drag the selected channel to the new channel button to create a copy of the channel. The channel copy is in black & white. 4    Select the channel copy in the Channels palette and double-click to open the Channel Options dialog box. 5    Enter a name for the channel copy in the dialog box. 6    With the painting tools, ap- ply white to the areas where clouds are to appear. Apply black to the area where clouds won’t appear. 7    Select the composite chan- nel to make it active. 8    Choose Image > Select > Load. Select the channel copy that you edited. The white area appears as a se- lection. 9    Select your background and foreground colors in the Inks palette. The colors you select determine the cloud color. 10 Choose Image > Filter > Render > Clouds to affect the selected area. Original image Color channel selected Final image Painted channel copy Composite channel with channel loaded
Canvas 8 Help: Image filters and effects (2 of 20)                                                  Page #708