I am running retroarch on a Pandora’s box which uses an Allwinner A13-based board. That is a single 1GHz core arm CPU.
While emulation runs fine on it - I get 60 fps on most platform and games - whenever I try to use any CRT shader, that drops dramatically… to an unplayable “below 15” .
That also happens with the “crt-pi” shader, that as far as know is one of the least taxing shaders.
I wonder if there is any way to get any scanlines on my system or if I am condemned to see the game that ugly on my screen.
Thanks for any clues!