Here is about the best we can hope for using a standard overlay.
There is a graphic glitch in my mask that I need to attend to.
Now that I am up to my elbows I realized that none of my 3DS overlays are compatible. I have already done a 3DS vertical for Batocera.
I will do a 4K version and include that also.
BTW. The shader I used in the horizontal shot is actually Guest Advanced… with some creative tweaking to give it an LCD look.
Here is the same Guest Advanced method tweaked for the Mega Bezel using an internal res scale of 6X.