Glamours are described as illusions, but I don't believe they're ever specifically noted as purely visual (correct me if I'm wrong). If that's all it was, one can imagine that all it would take is an errant touch to reveal the truth of things. At the same time though, the wearer of the Glamour may or may not have actually physically changed at all. It's never noted that they themselves have changed form, or that it's something they have to adjust to (though the sources from which we can draw that information are limited).
As such, I always accepted a Glamour as a distortion of perception in general, rather than a transformation or a mundane trick. Imagine taking some kind of drug that made you believe you were giant, and everyone else was small. Nothing would have to have changed but your own perception, but as you see, touch and move around regular-sized people, you would be swearing up and down that they were pitiful munchkins, and that you were their towering king.
And why couldn't magic just do something like that?
Of course the thing that makes this magic so potent is probably what makes it so rare and so fragile. It takes a lot of effort to convince someone that their senses are false, and not all senses are created equal. A Sylph may not know how to compensate their illusion to account for a Elezan's hearing, or a Miqo'te's sense of smell, or even the spatial awareness of an Au Ra who may be better at "sensing" the true size and shape of things.
Just an alternative notion of how a Glamour might work.
As such, I always accepted a Glamour as a distortion of perception in general, rather than a transformation or a mundane trick. Imagine taking some kind of drug that made you believe you were giant, and everyone else was small. Nothing would have to have changed but your own perception, but as you see, touch and move around regular-sized people, you would be swearing up and down that they were pitiful munchkins, and that you were their towering king.
And why couldn't magic just do something like that?
Of course the thing that makes this magic so potent is probably what makes it so rare and so fragile. It takes a lot of effort to convince someone that their senses are false, and not all senses are created equal. A Sylph may not know how to compensate their illusion to account for a Elezan's hearing, or a Miqo'te's sense of smell, or even the spatial awareness of an Au Ra who may be better at "sensing" the true size and shape of things.
Just an alternative notion of how a Glamour might work.