just fyi you're not getting any upload responses because that shader is horribly outdated and most people wouldn't bother holding on to it. if you'd spent 30 seconds searching around on the poiyomi discord, you'd find that it's been replaced with the grabpass shader. it was a niche and limited shader back in the early poiyomi days, but now it's a fully-featured function of the grabpass shader. you just have to tweak some of the settings. look around the discord for examples.