Not even one comment? ;.;
Well, howsabout this, instead...
IIRC the Uchiha were, at one point, an offshoot of the Hyuuga, and their Sharingan an alteration or development of the Byakugan. Presumably, this would mean that they occupy the same space in the genome, and are thus mutually exclusive. The same would not be true, of course, of, say, Kimimaro's disgusting bone tricks, and might or might not apply to other visual blood limits, but those two at least should be impossible to combine via breeding.
OTOH, it might be possible to get at least some of the same effects using skill and training.
About the Byakugan, we know that it can see chakra both in the environment and within the bodies of others with extreme sensitivity, has essentially a full spherical field of view, and consumes chakra to use.
About the Sharingan, we know that it can see chakra within the bodies of others (refer to the Valley of the End fight), provide its owner with eidetic recall of everything seen while it was active, that the use of learned techniques does -not- require the Sharingan to be active (Sasuke vs. Yoroi in the Chunin Exam prelims), inflict hypnotic suggestions on individuals within its field of view (Kakashi vs. Zabuza), that it consumes chakra, and that it damages itself progressively while active.
We also know that the two are related.
Thus, conjecture:
The Byakugan creates ordinarily inert structural alterations in the surface of the eye which, when exposed to the proper flow of native chakra, stimulates the optic nerve if hit with even a hint of -external- chakra - such as that radiated as excess by living bodies or as decay products by ninjutsu like the various sorts of Bunshin. Additionally, with practice, this process can be reversed - if surplus chakra is fed into the Byakugan structures then they radiate it into their environment in a coherent fashion. This emitted chakra leaves the body, travels until it contacts an obstruction, and then scatters, much as the sound waves emitted by sonar do... and, again like sonar, that backscatter can be interpreted to form an image of one's environment. 'Tight beaming' directed emissions (perhaps controlled by the iris, assuming the chakra structures are present within it as well) can gain a useful return far beyond normal visual range. The blind spot is simply the gap where the optic nerve goes.
They also form the cataract-like white layer over the iris and pupil that give the Byakugan its characteristic 'blank sphere' look.
This suggests a possible - no, two - weaknesses in the Byakugan that we haven't seen. First, a Hyuuga's actual, normal vision is probably poor even in good light and non-existent in bad - their eyes look blind because, well, they almost are. Second, seeing anything that isn't emitting chakra - whether because it has none or isn't emitting or (more likely) is directing its emissions somewhere -other- than at the Byakugan's owner - will require conscious effort.
I suspect that interpreting the amount of data coming in from not only the normal retina (assuming it still functions) but also that outer chakra-sensing layer results in or involves a certain amount of hypertrophy in the optic nerve.
The Sharingan, I think, is nothing more or less than a Byakugan sans white outer layer - most of its emission structures, though retaining the ones in the iris. The excess visual processing capacity from the unaltered optic nerves allows a detailed examination of even the quickest movements as well as the finest details of the environment - essentially allowing an Uchiha to do orders of magnitude more 'looking' at a given subject in a given amount of time, after which point copying what has been seen is merely a matter of memory. Carefully redirected internal chakra might allow that excess capacity to be repurposed to consciously direct chakra flow throughout the body (needed to get strange ninjutsu right without practice) or the precise shape and movements of the iris (and its attendant chakra structures) and, with it, the exact shape, frequency, etc. of its emitted chakra 'beam'.
If, as I suspect, most of the chakra consumption of conventional genjutsu is involved in flailing around trying to find and connect to the target's chakra system so that it can be followed back to their sensory nerves, then that tightly directed, focused beam would make a Sharingan-cast genjutsu far more efficient than most equivalents - on top of its not needing visible hand seals.
The Mangekyo is nothing more than a way of overriding the eye system's usual amplitude limits - a sort of conscious suicide overload - and allowing it to channel enough chakra to cast actual ninjutsu. Amaterasu? Or that space-warping trick Kakashi used? Ninjutsu. Doable with seals.
...this means that:
1. A Hyuga who could activate their iris-structures and surface-structures separately could replicate at least most of the Sharingan's abilities, though their actual vision would limit their ability to copy on the fly.
2. An Uchiha has everything needed to learn and use Jyuuken.
3. A theoretical Uchiha CoX toon could have eyebeams.
^_^
Ja, -n
===============================================
"I'm terribly sorry, but I have to kill you quite horribly now."
Well, howsabout this, instead...
IIRC the Uchiha were, at one point, an offshoot of the Hyuuga, and their Sharingan an alteration or development of the Byakugan. Presumably, this would mean that they occupy the same space in the genome, and are thus mutually exclusive. The same would not be true, of course, of, say, Kimimaro's disgusting bone tricks, and might or might not apply to other visual blood limits, but those two at least should be impossible to combine via breeding.
OTOH, it might be possible to get at least some of the same effects using skill and training.
About the Byakugan, we know that it can see chakra both in the environment and within the bodies of others with extreme sensitivity, has essentially a full spherical field of view, and consumes chakra to use.
About the Sharingan, we know that it can see chakra within the bodies of others (refer to the Valley of the End fight), provide its owner with eidetic recall of everything seen while it was active, that the use of learned techniques does -not- require the Sharingan to be active (Sasuke vs. Yoroi in the Chunin Exam prelims), inflict hypnotic suggestions on individuals within its field of view (Kakashi vs. Zabuza), that it consumes chakra, and that it damages itself progressively while active.
We also know that the two are related.
Thus, conjecture:
The Byakugan creates ordinarily inert structural alterations in the surface of the eye which, when exposed to the proper flow of native chakra, stimulates the optic nerve if hit with even a hint of -external- chakra - such as that radiated as excess by living bodies or as decay products by ninjutsu like the various sorts of Bunshin. Additionally, with practice, this process can be reversed - if surplus chakra is fed into the Byakugan structures then they radiate it into their environment in a coherent fashion. This emitted chakra leaves the body, travels until it contacts an obstruction, and then scatters, much as the sound waves emitted by sonar do... and, again like sonar, that backscatter can be interpreted to form an image of one's environment. 'Tight beaming' directed emissions (perhaps controlled by the iris, assuming the chakra structures are present within it as well) can gain a useful return far beyond normal visual range. The blind spot is simply the gap where the optic nerve goes.
They also form the cataract-like white layer over the iris and pupil that give the Byakugan its characteristic 'blank sphere' look.
This suggests a possible - no, two - weaknesses in the Byakugan that we haven't seen. First, a Hyuuga's actual, normal vision is probably poor even in good light and non-existent in bad - their eyes look blind because, well, they almost are. Second, seeing anything that isn't emitting chakra - whether because it has none or isn't emitting or (more likely) is directing its emissions somewhere -other- than at the Byakugan's owner - will require conscious effort.
I suspect that interpreting the amount of data coming in from not only the normal retina (assuming it still functions) but also that outer chakra-sensing layer results in or involves a certain amount of hypertrophy in the optic nerve.
The Sharingan, I think, is nothing more or less than a Byakugan sans white outer layer - most of its emission structures, though retaining the ones in the iris. The excess visual processing capacity from the unaltered optic nerves allows a detailed examination of even the quickest movements as well as the finest details of the environment - essentially allowing an Uchiha to do orders of magnitude more 'looking' at a given subject in a given amount of time, after which point copying what has been seen is merely a matter of memory. Carefully redirected internal chakra might allow that excess capacity to be repurposed to consciously direct chakra flow throughout the body (needed to get strange ninjutsu right without practice) or the precise shape and movements of the iris (and its attendant chakra structures) and, with it, the exact shape, frequency, etc. of its emitted chakra 'beam'.
If, as I suspect, most of the chakra consumption of conventional genjutsu is involved in flailing around trying to find and connect to the target's chakra system so that it can be followed back to their sensory nerves, then that tightly directed, focused beam would make a Sharingan-cast genjutsu far more efficient than most equivalents - on top of its not needing visible hand seals.
The Mangekyo is nothing more than a way of overriding the eye system's usual amplitude limits - a sort of conscious suicide overload - and allowing it to channel enough chakra to cast actual ninjutsu. Amaterasu? Or that space-warping trick Kakashi used? Ninjutsu. Doable with seals.
...this means that:
1. A Hyuga who could activate their iris-structures and surface-structures separately could replicate at least most of the Sharingan's abilities, though their actual vision would limit their ability to copy on the fly.
2. An Uchiha has everything needed to learn and use Jyuuken.
3. A theoretical Uchiha CoX toon could have eyebeams.
^_^
Ja, -n
===============================================
"I'm terribly sorry, but I have to kill you quite horribly now."