I'm a little confused by any of this counting as a particle-- I'm not opposed to the idea, but when I think "particles" I think small images, like demonstrated in this video/ BaiYu's tool. , so I think I'd need some kind of demonstration to understand better.
I do have a suggestion that might work, though it does require renpy -- Nai's shader pack has shaders has both VHS bar effects and staticwhich sounds like that's what you're going for.
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yeah sorry, i realise now that my explanation wasnt exactly the best 😪 the image in my head definitely leans more towards small particles than the image example i sent 🙂↕️
im gonna try out the shader pack you linked (tysm for linking it, it looks super cool!! 💜). if i dont like any of the shaders, ill probs come back once ive tried to mock up a demonstration of what i had in mind hehe