Detect Magic and material penetration

[hyphz]

In previous d20 games, we've been used to Detect Magic being able to penetrate some surfaces, and D&D generally gave a list of what could stop it.

Detect Magic in FP2e gives no such list, but does state that it's a "30 foot emanation". Page 457 says that "in an area effect creatures or targets must have line of effect to the point of origin to be affected", which would give it no ability to penetrate any material at all. However it is still not quite clear because technically Detect Magic only has an effect on the caster and their knowledge, not on the objects it detects. If Detect Magic affects/target the objects that it detects this could have further strange consequences down the line, such as, for example, triggers for "when a spell is cast on this object" would activate when it was detected.

So does Detect Magic target the things it detects (especially in the 4th level Heightened version), and what materials - if any - can it penetrate?

[Rysky]

Line of Effect, pg. 457 wrote:

When creating an effect, you usually need an unblocked path to the target of a spell, the origin point of an effect’s area, or the place where you create something with a spell or other ability. This is called a line of effect. You have line of effect unless a creature is entirely behind a solid physical barrier. Visibility doesn’t matter for line of effect, nor do portcullises and other barriers that aren’t totally solid. If you’re unsure whether a barrier is solid enough, usually a 1-foot-square gap is enough to maintain a line of effect, though the GM makes the final call.

In an area effect, creatures or targets must have line of effect to the point of origin to be affected. If there’s no line of effect between the origin of the area and the target, the effect doesn’t apply to that target. For example, if there’s a solid wall between the origin of a fireball and a creature that’s within the burst radius, the wall blocks the effect—that creature is unaffected by the fireball and doesn’t need to attempt a save against it. Likewise, any ongoing effects created by an ability with an area cease to affect anyone who moves outside of the line of effect.

[Flambe]

I was soooo happy to see the materials removed from Detect Magic in the new edition.

I don't know if I agree that a simple sealed paper envelope or a pocket is enough to prevent a 4th level detect magic from detecting an Orb of Gold Dragonkind or a Holy Avenger Longsword.

This rule also prevents the spell Detect Poison from detecting if the fluid in that stoppered vial or bottle is poison or not.

At my table, it will work regardless of material. (it does stink for Society players though)