If they were using a polarizing filter on their lens, then the two targets would appear to have uniform brightness. What you’re seeing isn’t one target brighter than the other, it’s a glare from the sun reflecting off the paper. Look at the far right of the right target and you’ll see a similar brightness value.
They photoshopped the shit out of that look at the background lighting why is it dark on one target and light on the other
TIL I learned that Chinese paper targets use Roman numerals.
If they were using a polarizing filter on their lens, then the two targets would appear to have uniform brightness. What you’re seeing isn’t one target brighter than the other, it’s a glare from the sun reflecting off the paper. Look at the far right of the right target and you’ll see a similar brightness value.
Learn more about polarization in photography with some similar examples.