By selecting the foreground or background buttons the base color for the spikes can be changed. Be sure to set the foreground or background color for your image to the color you're interested in using the color palette before using this feature. Example Images Here is an example of how the sparkle plug-in can be used to add both lens flare and a feathered edge to an image. 76 The rest of the values used in the sparkle dialog box are the default values. Notes Increasing the Threshold value will have dramatic effects on the time it takes to process and image.
Higher thresholds mean significantly longer times to process.
The relationship is not linear. Increases in Flare Intensity and Spike Points will also significantly increase processing time, although probably not as much so as the increase in Threshold. Changing the Spike Color from white to either background or foreground will increase the time to process the image, but the increase is not significant. The same is true for decreases in Flare Opacity. Changes in the other values will have little to no effect on processing time.