Noob here, but major old school rep… Posting this because I’m not getting any hits looking for a shader that emulates a simple color overlay.
I have memories of 2 specific examples: Super Bug (Atari arcade) and the Magnavox Odyssey home console. Anyone remember the old Sears Wish Book? (there’s an obscure reference ).
I never saved enough allowance money to buy an Odyssey back in the day but I spent hours pumping quarters into Super Bug (it was the one video game they had at the bowling alley!). SuperBug had a clear plastic yellow circle stuck to the screen - dead center, over the bug. You can see the effect in the mp4 here:
All that said, I’ve been gearing up my man cave with a RetroArch based system and my wizkid son is helping me with the tech. He created a shader for my SuperBug emu but I’m having trouble getting it going on my Atari fight stick I bought on clearance from MicroCenter. He says it doesn’t compile (failed message pops up when we select it in the RetroArch menu). I’m a developer as well and not having much fun navigating the GUI and the file system for a clue as to why it simply wont load. Note that it works fine on the PC (the fight stick is a Pi4 based RetroPie/EmulationStation).
Bottom line: is there a platform (built-in) shader I should look for?
Any help or thoughts would be greatly appreciated!