History / History Brush
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The history brush allows you to paint backwards in time to the image in the way it appeared when you first opened it in Photoshop. For example, here is the image untouched by any special effects. I'm going to go to the filter menu and I'm going to apply let's say a liquefy filter and what I'm going to do is I'm going to distort this pretty badly. So I'm going to just pull some of this, uh, house area and some of the grass area and I'm going to increase the size of my brush and I'm really going to warp this out a little bit more. So I'm going to just do this kind of Salvador Dali thing to the, to the landscape here. And now I'm going to click OK. Now with this filter applied, I might want to dial that back a little bit to reveal how the house used to look before I applied this filter. So I can go to my history brush, which is located right here, and I can paint this filter away, while retaining the filter as it's applied to the landscape. So how cool is that? I'm going to do the same thing with the tree. I'm going to paint that tree back to it's original state. And what's happening is Photoshop is simply looking back at the image as it was when you first opened it and allowing you to go back to that state. It's almost like erasing special effects. Now I'm going to revert this image so we can go back to the way it was in it's pristine quality and I'm going to show you another way to use this to provide special effects. I'm going to draw some crop circles here like, you know, the ones you find when aliens land in your, uh, farm area. I'm going to hold down the shift key and draw another one of these circles here and I'll draw one here. Now what I'm going to do is I'm going to hold down on my keyboard the optional alt key and I'm going to draw some circles inside these guys so we can have some rings. Now I'm going to go to select inverse and I'm going to apply an adjustment called variations and I'm going to make sure I add a lot of green, as you see here, which I already did earlier. So I'm going to click reset and, by the way, if you forgot how to do that, just hold alt or option and click where it says cancel and then the reset button appears. Now I'm going to add more green to this image here. And if you see the preview here, my protected area is protected by the mask that I just created by drawing with the elliptical marquee. Now what I can do is I can paint backwards in time. So I have all of this green here and I'm going to grab my history brush and I'm going to increase the size of my brush quite dramatically and I'm going to paint back in time. So the only areas are going to be, uh, the sky here and the irradiated area that was left behind when the UFOs landed and turned all the grass green. And the only areas that are not effected are the areas in the grass in which the, uh, alien ship has not landed. So I'm going to deselect that. As you see here, we have this cool crop circle kind of effect. Of course, I could undo that deselection and I could inverse it again and what I could do, of course, is I can apply a blur inside of this if I want to really just give a little bit more of a punch there and blur the inside of that crop circle a little bit. And now we have this cool crop circle effect by painting back the areas that we don't want to by using the history brush. And we can even go a little further and paint this area too of the field so that the aliens simply landed in this part of the field and everything else is unaffected. So once again, the history brush simply looks at the, uh, image as it was in it's earlier state when it first was opened and allows you to paint backwards in time to restore parts of that image so you can maintain special effects and paint away back to the original.
Tutorial Information
| Course: | Adobe Photoshop CS3 |
| Author: | Dwayne Ferguson |
| SKU: | 33782 |
| ISBN: | 1-933736-98-4 |
| Release Date: | 2007-08-02 |
| Duration: | 9 hrs / 161 lessons |
| Work Files: |
Yes |
| Captions: | For Online University members only |
| Compatibility: |
Vista/XP/2000, OS X, Linux QuickTime 7, Flash 8 |
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