The SO6P was able to use "creation of all things" which izanagi was based off and its assumed he suffered no side-effect from using it.
I would imagine that because the sharingan is a weaker mutation, it can use it but at the cost of its light, but maybe the rinnegan doesn't suffer from that?
If not, I would assume the user would have to have a double rinnegan with a extremely powerful life force, hence possibly why Jin Madara couldn't spam it because he wasn't Uzumaki, or why Nagato couldn't because he wasn't the original owner.
I would imagine that because the sharingan is a weaker mutation, it can use it but at the cost of its light, but maybe the rinnegan doesn't suffer from that?
If not, I would assume the user would have to have a double rinnegan with a extremely powerful life force, hence possibly why Jin Madara couldn't spam it because he wasn't Uzumaki, or why Nagato couldn't because he wasn't the original owner.