This is with the image in the rpa file right?the renpy files that need replacing are only like 20mb, it's just code stuff.
the 4k images didn't fit to screen properly for example
ingame
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outside game
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i don't really know much about renpy to make it fit properly
It might work correctly if you ran unren on the game and then replace the images in the folder, instead of replacing the rpa file only. But I'm not sure about it.