First, this repo doesn't seem to match the files at Curse, so instead of linking to a forked branch, I used a gist.

In the next Alpha, Masque will support the IconBorder region better, in that it will hook it to prevent the game, or add-ons, from changing its texture. Having tested it in game, this requires a bit of a reversal of what's currently being done in Bagnon_Facade.

Instead of using the IconGlow region for the Border, simply pass IconBorder as its own region. Additionally, you'll want to set the texture for IconGlow to nil so it doesn't show up.

You should also use the second return of the LibStub() call to get Masque's API version and use that determine how to make the call so it's backwards-compatible. I've done everything in the gist except include the additional regions (listed in the change log).

https://gist.github.com/StormFX/f9de64de5d60197cb75451f9e81900e5

Hi! Going over the mods and realized I never got to answer this.
I was a bit confused, cause what you describe and the gist appear to contradict each other? As in, in the gist you seem to have made some changes but then gone back on most of them?

Is what you wrote still true? Or should I just follow the gist? The current code of the mode appears to follow the latest version of the gist.

I think the latest version of the gist is accurate, as I believe that I realized that just passing the IconGlow as the IconBorder to the button data caused the least amount of issues. But it's been awhile and my memory is a bit spotty. I would just leave it as-is and if there's changes to be made, I'll either post here or create a new issue, whichever you prefer.

Ok! I'll close for now.