Thank you for the reply, T. Modes -- that's a great feature to know about.

I'm not experienced in it's use, so I apologize if I'm missing something, 
but "Edit CP" seems to have a few problems for my use-case:

- (this is the biggest issue:) I can select a rectangle, but it applies in 
the same position to all the images; the value of masks is that if a tree 
branch blows into a chosen area, I can mask it out on an image. For a 
complex set of images, with branches blowing around and so forth, I need to 
mask each image a little differently, and this is where having a real "only 
consider making points here" mask would be much easier to work with 
compared to the exclusion masks (or the Edit CP approach)
- similarly, when the images move a lot relative to each other the 
rectangle isn't always overlapping the same region in each image
- I can only draw rectangles, which makes it a little difficult to work 
with strangely shaped areas (which is easy to do with masks)
- the fast preview window is pretty low-resolution (compared to the mask 
editing window) so it's hard to draw an accurate rectangle (it's hard to 
see references like thin tree branches that disappear in the low-res 
preview version of the image.)

To be more clear, the use-case is this: a picture of waterfall behind many 
trees. There is a steady, relatively unmoving part of the image: that of 
the rocks on either side of the waterfall. But there is the moving water, 
and the many trees that are blowing around. I go through all the images and 
mask everything out except the steady rocks. This works great, it just 
takes a really long time to do for 20 images, with lots of tree branches in 
various positions, etc. I have to make 6-8 masks per image and adjust many 
of them to fit each individual image. Then I have to individually remove 
every single mask when done making the CPs.

Here's an example image: http://caseyconnor.org/pub/image/scall-take2.jpg

You can see how most of that image consists of moving, dynamic stuff that 
has to be masked out differently in each frame, while there is still a 
solid, unmoving part of the image which is also in different parts of each 
frame depending on the branches, etc.

I understand if this is not a high priority, and maybe it's difficult to 
code the "only make CPs here" mask; maybe not many people use Hugin for 
alignment. But such a mask would be really handy in these situations!

It would really help to have a "remove all masks" button, though. :-)

Thanks for the consideration,
-c

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