issue resolved! i had another shader that clashed pretty heavily with this (the default water shader) works perfectly now!!! leaving this up just incase. awesome asset by the way!!!
"hey this is pretty awesome. i was able to implementing this into my my project pretty seamless but i am running into this on issue. (probably user error on my part lol) i want this to be 1920X1080 so i adjusted the macros in the initiation script
#macro VIEW_W 1920
#macro VIEW_H 1080
but it becomes really laggy. do you have any ideas on how i would upscale something that is 480X270 to 1080 without killing my fps."