What are these weird splotches?

Never saw this before, scanned myself so I can provide negatives if needed...

https://preview.redd.it/hktkzqe215ng1.png?width=2312&format=png&auto=webp&s=5c71eeaead97bafabf51f8a64d6f2c117096a599

https://preview.redd.it/oia3lqe215ng1.png?width=2320&format=png&auto=webp&s=5ea226970374600dd97f344e79f83a998b6fbafb