Sorry, the post I saw refers to Orobas and not Orias. Is this one:
About this biological stuff, well, I am a mathematician, in fact an engineer so this is way over my area of study. But at the top of my ignorance, I believe that shapeshifting, at some point, need to alter the DNA in some way, that’s why I mentioned Orias. One Brazilian magician claims to have got his blue eyes from Orias since his eyes were brown in the past. I don’t know if I believe in him, mostly not but at this point, if it truly happened, some genes had to be altered… Or am I wrong?
Well, the post is here. Look at it.