The original project doesn't take in account the fact that you are overlaying your images, meaning that if u have 50% image 1 on top of 50% image 2 the result will show 50% image 1, 25% image 2 and 25% background, whereas if u have 50% image 1 on top of 100% image 2, the result is 50% image 1 and 50% image 2 (because image 2 only had 50% left from image 1)
Thanks to @CesarPolymes for the original project mean of pixels image finder thing.
