i think it can. since that tech burns on contact
i dont think he means if it can burn glass, i think he means if the caster is trying to get someone or something behind the glass?
If you were referring to what I said, I didn't mean he was aiming for the glass, I was saying that even if he was focusing on someone/thing beyond the glass, the glass would have to burn first because it is in the way. If amaterasu was able to be used through transparent matter/or chakra, then it could be used to get Itachi behind his Yata and that would be ridiculous.
Amaterasu burn all that is in the users line of sight. If glass is in the way then the glass gets burned/melted, once that is out of the way what was on the other side is next. So in my opinion no.
Yes it appears on whatever the eye FOCUSES ON