Getting around parma

[ExarKun]

This thread is always interesting I think when it comes to magic, resistance and matter.
(The interesting part is not the quote but what Iudicium wrote under it, which i copy here for the sake of convenance:

@Iudicium

First, I need to demonstrate that the rules seems to imply a difference between space and matter.
That is, someone with sufficient Magical Resistance will not be able to occupy the same space as something created with magic.
But, at the same time, some magically created matter (cold ice, for exemple) will be be able to affect someone who has sufficient MR.

So, an apprentice using CrAq to create an Ice Wall would stop an Archmage. But, at the same time, if the archmage touch the wall, he will not suffer damage from the cold.
His hand will not pass through the wall, even if he has high MR and the ice is created by magic, because the ice created already "occupy the space". It appears MR does not protect against that.
Also, it appear that it is of no concequence if space is occupied with things created with magic or not.

The water would not drown the magus, but the magus will be able to swim (not walk) on it, because water space is liquid and adapt itself. A bridge, as Halancar writes, is solid, and the magus would walk upon a magical created bridge even if it doesn't penetrate his parma magica.