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Smooth Edges Around a Cut-out

May 12, 2012, 20:50 (This post was last modified: May 12, 2012 20:51 by DavidBrennan.)
Post: #1
Smooth Edges Around a Cut-out
In GIMP 2.8, I've been having a great deal of trouble getting good edges around elements that must be overlaid onto new items.

Such items seem to need (a) a progressive blur around the edges and inward to its center, and (b) a decreasing opacity from the edges and inward toward the center.

I cannot figure out how to satisfactorily achieve this. I use this all the time, but now in 2.8 I cannot. (The only "solution" I can think of is using a fuzzy brush around the entire perimeter, but that does not blur it, and, of course, it takes forever....there's no point in even having a matte if you're going to do it manually!)

This is very significant for me. If anybody could provide solutions, I'll be hugely grateful.

(Also....I understand that this is a horrible cut-out of Batman! I did that intentionally just to demonstrate the problem.)

[Image: Batman-1.jpg]
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May 13, 2012, 11:48
Post: #2
RE: Smooth Edges Around a Cut-out
Does anybody know of a place where I can request a script or add-on for this? I know almost precisely what must be achieved:

1) Selection (with ZERO deformation of it)
2) A designated distance from the pixels is
a. progressively blurred and/or
b. progressively made transparent

So if you have a square and you apply this to a Selection, then the square's perimeter then has a beautifully smooth transition from it to the (now deleted) Selection area.

The user would designate the distance from the Selection that this takes effect (maybe just 2 pixels in a good cut-out, but maybe 10 in a bad cut-out) as well as getting to opt for whether it's transparency, a gaussian blur, or both.
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