Before 2009, Apollo missions images that we saw were scanned from the secondary copies that NASA distributed to research facilities after each mission. Only in 2009 NASA made high-resolution scans from the original films & made them available to the public.
Today, we can still find the older scan results. Flat-Earthers like to find defects in these low-quality scans & use the fact as “evidence” they are just paintings. In reality, they are scanned from the printed photos, which can preserve the texture of the photo paper itself.