I accepted the challenge by magorium to automate making mask templates then analyzed the results. There are issues.
Uhm... it was not my intention to put you to work, just an idea.
Whew! That involves a lot of work but it could save a lot of time.
It indeed can save a lot of time....
Update : The results are in but the conclusion isn't satisfactory. Although it would be nice to automate the mask making process it isn't feasible because of alpha blending. So it seems there is no substitute for the human eye when it comes to making mask templates.
.. that is why it is very unfortunate that you could not get it to work with the glow-icons you are currently working with.
In that case i am very sorry to have put you up to this. I could have prevented that by analysing the icons with some professional picture editing software.
It does make me wonder though.. the original author does not have time to spent to do all this manually, so (s)he must have been using a drawing tool (border-lasso or something similar) in order to determine the border for glow-area and then apply the glow-pattern. So that should at least give/provide a recurring glow-pattern. At least that is how i understand for these kind of things to work (so i might be totally off there as well)
Thank you for making the effort and reporting on your findings miker :thumbsup: (sorry for my delayed response)