I'm a -huge- fan of CRT shaders because well... all our favorite games look awful on 4k TVs and honestly I'd die a happy man if I never had to carry around another CRT Television in my life. I love that I can get this effect without the need of the actual TV.
I've actually contemplated going through and making a SQ Movie of all of the games I have with shaders enabled but then realized that I change my shaders depending on the TV I am using and it would look quite a bit off if I slipped in a different TV.
First, would it even be possible to port Shaders from Mame/Retroarch/whatever else you guys use? I personally use Mame, Retroarch, and Demul(Not a fan but it's all there is).
I absolutely love this front end simply because I do what I want when I want with it, and once you kind of understand the logic behind it... it's logical (Looking at you Hyperspin)
I did a forum search and didn't find anything with bgfx/shaders but if I missed it please point me in the right direction. If there's some backwards way of implementing it let me know - and if you have some general grunt work you'd like me to do I'm not a coder but I kind of get computers and can learn.