Comment 1 for bug 1697105

Just today we had a conversation at the #irc and maybe this description of the problem is not getting through?

Ended up making screen captures of the "gap issue" problem:

introducing the problem:
https://www.youtube.com/watch?v=5WRHzL8OXx4&feature=youtu.be

showing an approximating model of what's going on:
https://www.youtube.com/watch?v=unqeQupHt8M&feature=youtu.be

making a simple additive alpha compositing filter:
https://www.youtube.com/watch?v=CbHww4QJ4RM&feature=youtu.be