Wow, this is completely unexpected!
It certainly looks legit, and I don't think it is a PS, given I don't recall any existing photo of a Y-20 in a similar orientation and background.
The question, is whether it is a new prototype or a repainted older prototype?
I think prototype 001 was the only one painted with a 78X number so far? This could simply be 003 (second flying prototype) finally painted in testing colours. 782 could be 002 (the static test frame)
It certainly looks legit, and I don't think it is a PS, given I don't recall any existing photo of a Y-20 in a similar orientation and background.
The question, is whether it is a new prototype or a repainted older prototype?
I think prototype 001 was the only one painted with a 78X number so far? This could simply be 003 (second flying prototype) finally painted in testing colours. 782 could be 002 (the static test frame)