With Photoshop CS3, any of the filters are automatically treated as “live” effects when applied to smart objects. This means that you can now preserve the ability to edit filters (as well as Shadows/ Highlights adjustments) that are applied to smart objects. These “smart filters” behave very much like adjustment layers, allowing you to alter settings at any time after the effect is applied, without losing pixel data or compromising image quality.
Defining Smart Objects
Smart objects in Photoshop are treated similarly to linked supports in layout applications such as InDesign or QuarkXPress. Image layers that are converted to smart objects are actually embedded into the Photoshop file, unlike linked supports in InDesign or QuarkXPress. However, even though the image is embedded, when it comes to editing, Photoshop still treats smart objects like traditional links in a layout application. Any changes (other than scaling, transforming, masking, or applying layer styles and smart filters) must be made to the source content file that Photoshop creates when converting.
To erase any image areas or to apply any adjustments directly to the smart object layer (such as Levels, Curves, or Hue/Saturation), you must choose Edit Contents from the Layers palette flyout menu or from the Layer --> Smart Objects submenu. An even easier way to edit smart objects is to double-click the smart object thumbnail in the layer. After choosing Edit Contents or double-clicking the smart object thumbnail, Photoshop displays a warning dialog box that reminds you that you must save after editing the source content file in order for the embedded preview to update in the layered document. Click OK to bypass the dialog and open the source content PSB file.
When you’ve finished making your edits, choose File --> Save and close the PSB file. The image layer automatically updates in the layered document. Smart objects can also be used to embed Adobe Illustrator or Camera Raw files into a Photoshop document. However, when the images are edited in Illustrator or Camera Raw, they do not automatically update in the PSD file.
Applying Smart Filters
To apply a smart filter, you must first convert the image layer into a smart object. To do so, choose Convert To Smart Object from the Layers palette flyout menu or from the Layer --> Smart Objects submenu. You can also choose Filter --> Convert For Smart Filters. After the image is converted, Photoshop displays a Smart Object icon in the bottom-right corner of the layer image thumbnail in the Layers palette. From the Filter menu, choose a filter to apply to the smart object. Note that Extract, Liquify, Pattern Maker, and Vanishing Point cannot be applied as smart filters. You can apply as many filters as you like, including filter combinations made with the Filter Gallery. Although technically not a filter, you can also apply the Shadows/ Highlights adjustment as a smart filter. Additionally, smart filters allow you the opportunity to apply the same filter settings to multiple layers at once, because a smart object can be created from multiple selected layers. Note that grouping multiple layers into a smart object can change an image’s overall appearance, especially if the layers are not adjacent to each other in the Layers palette. Smart filters can also be applied to RAW files that have been embedded in a smart object.
After smart filters are applied, Photoshop displays them in the Layers palette similarly to the way it displays layer styles—as a list of items underneath the image layer. The list of effects can be expanded or collapsed by clicking the triangle icon next to the layer’s fx icon in the palette. Clicking the familiar eye icon next to each effect name in the Layers palette temporarily disables the filter. Click the eye next to the words Smart Filters to temporarily disable all the applied filters for that layer. Smart filters also come equipped with their own masks, which can be used to control visibility for the applied effects in a nondestructive way. Painting in a smart filter mask with a brush is a great hands-on technique for applying filters to an image layer. After the initial filter settings have been chosen and the filter dialog box has been closed, you can reopen it at any time to change settings. To reopen the filter dialog box, double-click the smart filter name in the Layers palette.
Each smart filter also contains its own blend settings that allow you to control how the filters interact with each other. By double-clicking the icon to the far right of the smart filter name in the list of applied effects, you can access the Blending Options dialog box, where you can apply preferred transparency and blend mode settings to the filter.
Defining Smart Objects
Smart objects in Photoshop are treated similarly to linked supports in layout applications such as InDesign or QuarkXPress. Image layers that are converted to smart objects are actually embedded into the Photoshop file, unlike linked supports in InDesign or QuarkXPress. However, even though the image is embedded, when it comes to editing, Photoshop still treats smart objects like traditional links in a layout application. Any changes (other than scaling, transforming, masking, or applying layer styles and smart filters) must be made to the source content file that Photoshop creates when converting.
To erase any image areas or to apply any adjustments directly to the smart object layer (such as Levels, Curves, or Hue/Saturation), you must choose Edit Contents from the Layers palette flyout menu or from the Layer --> Smart Objects submenu. An even easier way to edit smart objects is to double-click the smart object thumbnail in the layer. After choosing Edit Contents or double-clicking the smart object thumbnail, Photoshop displays a warning dialog box that reminds you that you must save after editing the source content file in order for the embedded preview to update in the layered document. Click OK to bypass the dialog and open the source content PSB file.
When you’ve finished making your edits, choose File --> Save and close the PSB file. The image layer automatically updates in the layered document. Smart objects can also be used to embed Adobe Illustrator or Camera Raw files into a Photoshop document. However, when the images are edited in Illustrator or Camera Raw, they do not automatically update in the PSD file.
Applying Smart Filters
To apply a smart filter, you must first convert the image layer into a smart object. To do so, choose Convert To Smart Object from the Layers palette flyout menu or from the Layer --> Smart Objects submenu. You can also choose Filter --> Convert For Smart Filters. After the image is converted, Photoshop displays a Smart Object icon in the bottom-right corner of the layer image thumbnail in the Layers palette. From the Filter menu, choose a filter to apply to the smart object. Note that Extract, Liquify, Pattern Maker, and Vanishing Point cannot be applied as smart filters. You can apply as many filters as you like, including filter combinations made with the Filter Gallery. Although technically not a filter, you can also apply the Shadows/ Highlights adjustment as a smart filter. Additionally, smart filters allow you the opportunity to apply the same filter settings to multiple layers at once, because a smart object can be created from multiple selected layers. Note that grouping multiple layers into a smart object can change an image’s overall appearance, especially if the layers are not adjacent to each other in the Layers palette. Smart filters can also be applied to RAW files that have been embedded in a smart object.
After smart filters are applied, Photoshop displays them in the Layers palette similarly to the way it displays layer styles—as a list of items underneath the image layer. The list of effects can be expanded or collapsed by clicking the triangle icon next to the layer’s fx icon in the palette. Clicking the familiar eye icon next to each effect name in the Layers palette temporarily disables the filter. Click the eye next to the words Smart Filters to temporarily disable all the applied filters for that layer. Smart filters also come equipped with their own masks, which can be used to control visibility for the applied effects in a nondestructive way. Painting in a smart filter mask with a brush is a great hands-on technique for applying filters to an image layer. After the initial filter settings have been chosen and the filter dialog box has been closed, you can reopen it at any time to change settings. To reopen the filter dialog box, double-click the smart filter name in the Layers palette.
Each smart filter also contains its own blend settings that allow you to control how the filters interact with each other. By double-clicking the icon to the far right of the smart filter name in the list of applied effects, you can access the Blending Options dialog box, where you can apply preferred transparency and blend mode settings to the filter.
Smart Filters
![Smart Filters]()
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