I am playing around the jitter recipes- Recipe 36: TinyVideo and Recipe 38: BrightLights. What I am trying to achieve is to brake down the video on a circled pieces and permute them after, similar to Recipe 37: Shatter.

I know that this is frequently asked question, maybe I am missing something, but I have this overlapping even when I discard the black pixels in a shader.

I am playing around the jitter recipes- Recipe 36: TinyVideo and Recipe 38: BrightLights. What I am trying to achieve is to brake down the video on a circled pieces and permute them after, similar to Recipe 37: Shatter. 

I know that this is frequently asked question, maybe I am missing something, but I have this overlapping even when I discard the black pixels in a shader. 

one-more-overlapping

No one have some idea why discarded pixels are visible here?

one more overlapping