Comment 2 for bug 1683057

First issue: This is the way how include masks work in stitching. With an include mask you want to force to include the area from one image. To achieve this this area is removed from all other images.

Second issue: Just looking at the further processed images does not help. Please provide the pto file which shows the issue. But I assume it is not an issue with mask, it is probably related to the translations parameters. see FAQ http://wiki.panotools.org/Hugin_FAQ#Why_does_my_output_covers_only_180.C2.B0.3F