Mr. Crystal Story on Twitter: "Regarding the NTSC Filter (because I can't shut up about it for some reason!) – I will be offering an option to toggle it on and off
Filthy Pants: A Computer Blog: CRT Pixel Shader Filter for SNES Emulation
Composite" and "RF" Blargg NTSC Filters, et al
Released - OLD TV Filter for GameMaker | GameMaker Community