Lightroom and Photoshop Camera Raw share image-processing technology to ensure consistent and compatible results across applications that support raw processing. These applications include Lightroom, Photoshop, Photoshop Elements, and Premiere Elements.
Photoshop Camera Raw
To ensure compatibility with Lightroom 5 Develop module settings, Adobe applications must be updated with the Camera Raw 6.1 or later plug-in. Photoshop users can update the Camera Raw plug-in automatically by choosing Help > Updates.
Sharing Lightroom settings with Camera Raw
By default, Lightroom Develop module settings are stored in the Lightroom database. To ensure that Camera Raw can view Lightroom Develop settings, the settings must be written to the file's XMP metadata. This metadata is stored in an XMP sidecar file (imagename.xmp) in the path of the proprietary raw files, or stored directly within DNG files. To update images with the latest Develop settings, go to the Library module and select the group of target images. Press Ctrl+S (Windows) or Command+S (Mac OS) to save the settings to the XMP metadata block. See Metadata basics and actions in Lightroom Help.
Viewing Lightroom settings in Camera Raw
Before working with Lightroom and Camera Raw, set the Camera Raw preference to Save Image Settings In Sidecar ".XMP" Files. By default, Camera Raw displays the image adjustments exactly as performed in the Lightroom Develop module.
Viewing Camera Raw settings in Lightroom
Raw files edited by previous versions of Camera Raw maintain their previous appearance when imported into Lightroom as long as the Camera Raw preference is set to Save Image Settings In Sidecar ".XMP" Files. To update files edited in Camera Raw after they have been imported into Lightroom, choose Metadata > Read Metadata From Files in the Lightroom Library module. See Advanced metadata actions in Lightroom Help.
Additional notes on Camera Raw and Lightroom
Camera Raw reads only the current settings for the primary image in the Lightroom catalog. Virtual copy adjustments and snapshot adjustments are not available in Camera Raw.