Patching the nadir
It happens that some objects move during a panorama shooting, and therefore do not end up in the same place when being stitched.
It is also possible to see objects that you wish to remove without them having moved, like a tripod at the nadir for example, in the case of an equirectangular panorama.
The Masking tool allows you to define constraints to keep or remove objects from a panorama, much like you might do through layers and masks in Photoshop, but much simpler!
It should be noted of course that to keep an object, it is necessary to have a full view of the source image, Autopano does not re-create any missing pixels.
And that to delete objects, you must have sufficient coverage in the background. which makes sense: if there is nothing to use behind the object, there will be a hole in the panorama.
How it's done
Here is an example of a simple use of an often encountered user case: removing a tripod from an equirectangular panorama.
This type of treatment required the use of Photoshop masks, either on the source images, or in post-processing, and in either case this workflow could be rather tedious.
Open the folder of the source images. We can see that they were taken with a fisheye lens and that we have three shots for the nadir. Doubling the shot is sufficient in most cases, but here, an extra photo was taken in to be sure to have the coverage to remove the tripod.
After the stitching, open the panorama editor.
Move the panorama using the Move tool, to have the nadir neatly in the center.
In the images mode, we can see our three images that have been stitched.
Activate the Masking tool, and add a red marker on the visible tripod for each picture, and a green marker on the image without the tripod. Validate the modifications.
Here is the result using the Preview tool: the tripod has disappeared! 3 clicks were enough to achieve what would have required an average of 10 minutes with Photoshop!