I got a request on EmuTalk where I go under the name Black Zero that I should make a pull request to https://github.com/libretro/common-shaders regarding these babies:
Now these are made for bgb, but seeing as there is some interest in this I would like to get a opinion from you guys about it.
As for the borders they probably gonna need some work to be able to work properly in RetroArch.
You can either get them from here: http://www.filedropper.com/showdownload.php/bordersv2
or just download them in my thread on EmuTalk
I don’t know how to make these work so if someone would be interested in making them work it would be great. They are just 24-bit .BMP files really.