NYPC Photoshop SIG |
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| Layer Mask | Often created from a selection, a layer mask determines what parts of a layer are visible. | ||
| Vector Mask | Often created from a path, a vector mask determines what parts of a layer are visible. | ||
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| Opacity |
On the layers palette. A slider from 0% - 100% Opacity determines how opaque the layer is. It affects the contents of the layer and the layer styles equally. |
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| Fill Opacity | On the layers palette. A slider from 0% - 100%. Fill determines how opaque the contents of the layer are. Fill Opacity affects only the contents of the layer, any layer styles are fully visible. |
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| Blend If |
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| This Layer | Drops out the darkest and/or
lightest pixels. Any pixel with a brightness value greater than the right slider is made transparent allowing the layer below to show through. Pressing the Alt key allows you to break the slider in half, use this to fade in the effect. |
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| Underlying Layer | Drops out the pixels over
the darkest and/or lightest pixels in the layer below. If the pixel below has a brightness value less than the left slider, the pixel in the current layer is made transparent allowing the layer below to show through. If the pixel below has a brightness value greater than the right slider, the pixel in the current layer is made transparent allowing the layer below to show through. Pressing the Alt key allows you to break the slider in half, use this to fade in the effect. |
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Layer Blending ModesDetermine how the pixels in the current layer interact with the pixel in the layer below, actually the sum of all the layers below. The horizontal separators, create groups of similar modes. Most of the times this similarity is visual, but in some cases it is purely mathematical. |
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| Normal |
The pixel in the upper layer cover the pixel in the layer below, | ||
| Dissolve | Makes random pixels on the upper layer go transparent to reveal the layer(s) below. If the more transparent the pixels on the upper are to start with, the faster they will go transparent (dissolve). |
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| Darken | Photoshop compares the brightness of the pixel on the upper and lower layers. The result is the darker color. It doesn't matter which is the upper of lower layer. |
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| Multiply | The numeric brightness of the upper layer is multiplied by the the brightness of the layer below. The result;t is then divided by 256 (the total number of brightness levels) ((Mid-grey:128) x (Mid Grey:128)) / 256 This always darkens the lower image. This appears to be done on a per channel basis. |
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| Color Burn | Wherever the upper level is darker than the lower level, the brightness and saturation of the upper level is applied to the lower level. The effect will be different depending on which is the upper and lower layer. |
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| Linear Burn | |||
| Lighten | The opposite of Darken. Photoshop compares the brightness of the pixel on the upper and lower layers. The result is the lighter color. It doesn't matter which is the upper of lower layer. |
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| Screen | If a pixel of the upper layer is brighter than the pixel of the lower layer, the upper layer brightness will be used. Because this is done per channel, the hue may also be affected. It doesn't matter which is the upper of lower layer. |
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| Color Dodge | Wherever the upper level is lighter than the lower level, the brightness and saturation of the upper level is applied to the lower level. The effect will be different depending on which is the upper and lower layer. |
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| Linear Dodge | |||
| Overlay | Areas of the upper layer that are above the 50% brightness level are screened and those that are below 50% brightness are multiplied. The effect will be different depending on which is the upper and lower layer Very useful for dodging and burning. |
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| Soft Light | Similar to Overlay, but the effect is more muted. The effect will be different depending on which is the upper and lower layer Very useful for dodging and burning. |
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| Hard Light | Similar to Overlay, but harsher. The effect will be different depending on which is the upper and lower layer |
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| Vivid Light | |||
| Linear Light | |||
| Pin Light | |||
| Difference | The two layers are compared. The more different they hue and brightness are the brighter the resulting pixel will be the more similar they are the darker the pixel will be. Used mainly when something is too big to scan and multiple scans are made. You can use this blending more temporarily to line up the scans. It doesn't matter which is the upper of lower layer. |
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| Exclusion | |||
Copyright 2005 Laura Balsam |
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