Alien Skin’s Snap Art 3 ($199, or $99 for an upgrade from previous versions) is the latest manifestation of image-altering software that works atop the architecture of Photoshop and Lightroom, that is, a plug-in accessible through the Filters menu in Photoshop and for Lightroom as an external editor.
To launch Snap Art from an image in Lightroom you first select the image (or multiple images for batch processing), and select Photo>Edit In>Snap Art 3. You can also right click on the image and select Edit In>Snap Art 3. When Lightroom asks you how to edit the photo, the company recommends you choose “Edit a Copy with Lightroom Adjustments.” This will tell Lightroom to make a copy of the image for Snap Art. You can also check and uncheck the Stack command, depending on how you want to see the image in the Library—choose Stack and you can easily unstack the image later, or just have it sit side by side in the normal Library (unstacked) view.