I brought up disillusionment charms before, which lead to some interesting answers and another thought has occurred to me that is related to my previous question.
Do disillusionment charms work only on sight, or on the other senses? Hogwarts (and this is the example I used in the other question, but never got an answer that applied to this) is protected with disillusionment charms. If a building is made, through such a charm, to look like ruins, will it feel that way too?
Here's an example: Say you have a stone building you want to hide from muggles, so you cast a disillusionment charm on it so it looks like ruins. From the muggle's point of view, a stone wall has fallen down, but in reality, that wall is there. If he waves his hand in what he sees as empty space where the wall was, will his hand hit the wall, or will the spell make him feel just air there?
Or will something else happen?