QUOTE (Sengir)
The physics of bending light aside, I think this explanation makes much more sense than "you target 237834562378 CCD sensors at once", why the disaster?
Because it's a fundamentally flawed concept on several levels:
1. Bending light is something that by definition of SR magics would fall into the "manipulation" spell category not into the "illusion" category
2. With light actually being bent the spells would actually have the bent photons as spell target(s) and not the person around/onto whom the spell is cast and ...
3. ... given the nature of such a particular change that also calls into question as to why a (living) perceiver has rule wise the right to resist that change.
4. Even if we are to allow spell resistance nonetheless we now face the following problem: In case of a successful resistance a spell's effect is normally cancelled out. With "bent light" that would mean a single person who succesfully resists should technically terminate the whole spell ... which he/she doesn't according to the rules.
5. Finally add thoughts about ramifications for the invisible person that the light is bent around in terms of being able to further see and/or thermal behavior once IR light is also bent in that manner.
The main misconception - as even evidenced in your "
you target 237834562378 CCD sensors at once" - players seem to have with illusion spells of that kind (which were called "indirect illusions" during 3rd for good reason) is this:
Those spells have actually two subjects / targets:
A) The person that the spell is cast upon is the spell's target and becomes the center of the spell's effect provided that he/she doesn't resist (and thus destroy) the spell.
B) Any observer becomes subject of the spell's effect just like they would become subject to the burning fire (spell effect) of a sustained fire aura (spell) when touching the latter. The spell's effect in turn is what - with the original description - creates false sensory input within the sensory organs of that observer and the observer get's to defend against that fake sensory input within his own system. Even if he/she succeeds at defending against the spell's effect he simply won't affect the spell itself that still resides on the person that the spell was cast upon. It just no longer affects that particular observer.
QUOTE (Sengir)
It's not explicitly labeled as such, but if it quacks like something for which you have a ruleset, it makes sense to use that ruleset

It would if it weren't for some "minor" details: a mana-based illusion spell is explicitly precluded from doing something that manifestations do ... the latter cross the planar borders between astral space and the physical world and they certainly do not cause drain as a result of the manipulation of mana within the perceiving entity. So - at least to me - manifestations are far from "quacking" like a mana-based illusion.
QUOTE (Sengir)
Being deaf or blind isn't necessarily congenital,
Certainly not and I didn't claim otherwise. But congential blind- and deafness are what's also encompassed by the respective "flaws" / "negative traits".
QUOTE (Sengir)
and even people born and raised totally deaf are able to hear via cochlear implants (although not necessarily understand spoken language).
And it takes them quite some time to make use of the information that such an implant provides. I've met more than a small number of players that have already a hard time when dealing with language barriers while their characters physically communicate with spirits (and vice versa) or a manifesting magician successfully communicating with a person not of their own language. So I simply don't see them too keen about manifestations provding an integrated perfect "translation" spell and a "you never learned to interpret such a sensation but I can instantly provide you with that" spell as a bonus. Again a matter of "too much it's magic" ... particularly with virtually no cost associated.
QUOTE (Sengir)
My problem with the blind seeing or the deaf hearing illusions is that not that it would be too much handwaving, but that it would make detecting illusions trivial: Close your eyes, if it's still there you are being had.
That's another bad ramification and thus yet another reason as to why I wouldn't call the solution either "simple" or "easy".
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QUOTE (Tymeaus Jalynsfein)

But It IS MAgic... It is a Psychic Manifestation...
Sure sounds like Magic to me.

I don't remember calling into question that "
it's magic". I seem to recall questioning the alleged "ease" and "simplicity" of that approach and then saying that it might also be "too much" of "it's magic" for certain tastes.