I've seen people say that Naruto's henge is different, Naruto's Henge is solid, and whatnot. I've seen Narutopedia classifying transformation technique as a ninjutsu however. Does this mean that all transformations are solid? Or does the emitted chakra maintain an illusion around the user? If its an illusion, then it wouldn't explain how its a ninjutsu. What are your thoughts?