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The Blur tool pop-up here contains actually three tools, Blur, Sharpen, and Smear. Let's start by taking a look at the Blur tool. I'll select that. We'll zoom in to Marcie and remember you can change the brush size on the keyboard with a Shift key. I'll blur out this eye here. Now, the amount of blur is controlled by this setting right here, the effect. So the effect in this case is the blur. So, I'm going to turn the effect down to a level of 2. Come over here and blur this eye, and you can see there is much less blur effect.
Now, if we go over to the Property panel and click on the Stroke tab, we can see that the brush type is set to blur. It's actually choosing from this pop-up here and you can change that if you wish. The effect setting for this particular stroke is 2, and of course if I increase that, the blur goes up. So, you can always edit your strokes after the fact. Change brush types, change the hardness settings, change the effect, anything you want. Okay, let's delete these. I'm going to select both of these and hit the Delete key so that we could take a look at the Sharpen tool.
Again, the effect is set for 15, so I'm going to sharpen this eye at 15, say whoa, that really sharpens that up. We will turn the effect down to 2 and do a more gentle sharpening over here. Once again, the brush type is set to sharpen from the pop-up. Stroke2 is selected up here in the list and its effect is set for 2. Of course, if I increase that, then Stroke2 will be sharpened much more. Again, we'll select these two and hit the Delete key to get rid of those, then take a look at the last tool in the Blur pop-up, the Smear tool.
Now, the interesting thing about the Smear tool is the effect has no effect. If I click and drag here, there is no way I can change the amount of smear with the effect. However, if the hardness is turned up, that has the effect of increasing the amount of smear that you get. Once again, on the Stroke tab, the brush type is set to smear out of the pop-up, and the effect slider is ghosted out. However, I could adjust the brush hardness if I want to bring down the effect, turning down Stroke2 now. It's like I almost turned it off.
So, the only way you can change the amount of smear is by dialing in the brush hardness.
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