I wonder, could Retroarch get a Black Frame Insertion setting that would purposefully drop a frame every 30 seconds or so? This would be to avoid image-retention on LCD screens that “charge up”, a dropped frame will inverse the pixel pattern and thus stop the build-up.
This post explains it better than I ever could:
https://forums.blurbusters.com/viewtopic.php?f=7&t=7539
See the point: Workaround #2: Interrupt BFI Cadence With Framedrops/Framedups
The guy who did our BFI implementation isn’t a big fan of this workaround, as it’s pretty jarring, but they just implemented a way to make shaders that tick faster than the content’s framerate, which should make it possible to do a lot of BFI/rolling-scan experiments very quickly and easily.
I see, I understand that such a workaround may look quite jarring but surely an option wouldn’t hurt? That with the shaders sound interesting though, so for now it would be best to wait for the shaders to be updated with the new possibilities?