Paranormal wallpaper not showing up correctly in studio

Hi! 

I've been wanting to make a recolor of the paranormal wallpaper but every time I create a new package and open up the paranormal wallpaper with the Sims 4 Studio, it does not format correctly, each time being very stretched and pixelated, whether I make the package an override, stand alone recolor, or swatch addition. I've attached pictures of what is happening.  

image links:
ibb.co/yYTWRt6
ibb.co/YTKZFJF

Thanks for any help you can provide!