Adobe has released the standalone Lightroom 6.4 and (available as part of Adobe’s Creative Cloud Photography plan), the latter of which gains a new Boundary Warp feature. For use with stitched panoramas that have non-rectangular boundaries, Boundary Warp analyzes the boundary and warps the image so its edges fit a rectangular frame (check out this  for some visual examples of using Boundary Warp). Note that Boundary Warp is available only for Creative Cloud members, and is not part of the Lightroom 6.4 update.
Both of Adobe’s professional photo cataloging and editing applications also gain tethered support for the Nikon D5500 and Nikon D7200 models, fix an issue that prevented Nikon cameras from tethering in OS X 10.11 El Capitan, quicken the speed of the panorama merging process, add a preference to prevent accidental “speed swiping,” improve thumbnail updating when copying and pasting settings in the grid view, ensure successful Auto Sync of settings when using smart previews, and add support for Fujifilm’s recently announced X series cameras. Lightroom CC 2015.4 and Lightroom 6.4 can both be downloaded via Help > Check for Updates. ($9.99 monthly subscription or $149 for the standalone app, free update, release notes, 10.8+ for Lightroom CC 2015.4 and 10.9+ for standalone Lightroom 6.4)