Using LR6 to create a DNG merged file from several JPGs that were shot handheld I've taken the cropped resultant DNG and expanded the crop area somewhat so there are blank areas at the top and bottom of the photo (inexact matching of original photos, and I want to include parts of all those originals). Trying to fill those blank areas using the Spot Removal tool. It works as expected in the interior of the photo, but if the target area includes any of the blank region, it does not "copy" any of the source pixels. It stops exactly at the edge of the original photos, and refuses to fill into the blank area of the merged photo. Workaround was to export/import a JPG file and edit that file. Anybody else seen this behaviour? Seems like a bug to me.
Without getting into the semantics of "bug", LR is behaving as intended by its developers. But a number of people have asked for the ability to fill in the edges with the clone tool, and Eric Chan (senior Adobe developer) has said,
We'll be investigating how to improve this in the future, but for now the best solution is to "fill in" the edges using Photoshop, or to "round trip" the image through Lightroom.
By "round trip", he means exporting the image as a TIFF or JPEG and then reimporting it.
Please add your vote and opinion to this topic in the official Adobe feedback forum: Lightroom 6: Clone brush ineffective on Panorama's white edges.
Thanks very much. That's clear, if disappointing news.