Work with Dissolve Mode in Software

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Work with Dissolve Mode
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Dissolve is both a painting and a layer mode This mode scatters random pixels wherever you paint, single pixels (not clumps of pixels, such as you see with photographic noise) that are aliased you can see them very clearly by itself, Dissolve produces a harsh look However, if you combine Dissolve painting mode with Overlay blend mode for a layer, you can achieve a pleasing, even dramatic lighting effect on a photo on the bottom layer
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Overlay mode screens (bleaches; see Know When to Use Screen and Multiply Modes) colors below the layer whose colors are brighter than 128 on the scale of 0 255 possible brightness values At the same time, Overlay multiplies (deepens) underlying pixels whose brightness
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Here s a nice close-up photograph of some nachos , but the lighting is a little cold
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value is less than 128 It s an interesting effect all by itself: Screen, Multiply, and Overlay modes are covered in Know When to Use Overlay and Light Blend Modes later in this chapter
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UICKSTEPS
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ADDING GRIT AND WARMTH TO A PHOTOGRAPH
Let s make the nachos image or just about any food photography image more appealing for print and Web display Follow these steps to add some stylizing, warmth, and a little Dissolve mode toning to an image:
Work with Lighten and Darken Modes
Lighten and Darken modes are the flip sides of the same coin: in Lighten mode, the blend layer lightens only areas on the base (the bottom) layer or multiple layers that are darker, and in Darken mode, blend layer areas only darken underlying areas that are lighter than the corresponding area Lighten painting mode is useful for brightening image areas without totally ruining image detail:
1 With your image in Photoshop, click Create
A New Layer on the Layers panel to create a new blank layer on top of the image
1 Pick a neutral, medium tone image color using the Eyedropper tool to sample 2 Create a new layer above the base layer, and choose Lighten mode for the layer on the
Layers panel
By default this is the current editing layer
2 Press D (default colors) so your foreground color
swatch on the Tools panel is black
Areas darker than your brush color are lightened to the color of your foreground color, but areas lighter than this color are unaffected
USE LIGHTEN MODE
3 Choose the Gradient tool It s a painting tool, and
it works in Dissolve mode
4 On the Options bar, click the Radial Gradient
button Then click the Gradient Picker down arrow to the right of the gradient preset thumbnail and choose the second one, foreground
to transparent Then choose Dissolve mode from the Mode drop-down list on the Options bar Continued
Suppose you took a photo of a striking sky, but your framing was a little off and a water tower or trees invade the bottom of the photo There is no need to crop to cope in this situation You use Lighten mode in combination with the Clone Stamp tool this is yet another painting tool to clone away the offending items You don t even have to mask the image
1 On the Layers panel, click Create A New Layer to create a new layer above your photo 2 Choose Lighten mode from the Layers panel s drop-down list
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UICKSTEPS
ADDING GRIT AND WARMTH TO A PHOTOGRAPH (Continued)
5 Click the Reverse, Dither, and Transparency
check boxes on the Options bar so that the Gradient tool travels from transparent to black
6 To display the gradient effect, drag from the
center of the image to the edge, and you ll get a somewhat unpleasant result, but this is okay you re not done yet Figure 7-1 shows the two layers composited, and a close-up of what Dissolve mode looks like when you paint Figure 7-1: Dissolve blend mode spreads foreground color pixels in a random arrangement
7 Soften the pixels on Layer 1: click Filter | Blur |
Gaussian Blur, set the Radius to 1 pixel, and then click OK
8 On the Layers panel, click the Modes down
arrow and then choose Overlay As you can see
in Figure 7-2, the nachos image has a pleasing vignette effect; the overall image looks warmer and a little stylized, and is perfect for a poster at a fast-food restaurant Dissolve mode produces different results depending on the Opacity setting you choose Because a gradient can travel from opaque to transparent, using Dissolve mode creates an arrangement of single pixels that vary as the opacity of the gradient decreases
Figure 7-2: Use Dissolve mode in combination with Overlay mode to stylize images
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QUICKFACTS
MERGING YOUR BLEND LAYERS TOGETHER
When you decide to merge a layer down, any layer takes on the blend mode of the layer to which you merge beneath it Therefore, if you merge a layer in Normal
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