Blocking all sound in 3d platforms

[Mad Dal 85]

I know that the 'Block Sound' linedef action stops enemies from hearing you, but is there any way to stop the enemies hearing you or block sound on 3d platform sectors so enemies above or below can't hear anything?

[Gez]

"Sound" (as far as the AI is concerned, it's not audio sound) is a sector-based property, so it cannot be blocked by 3D floor. You'll have to do a different room-over-room setup using portals instead if you want to be able to block sound.

[Mad Dal 85]

21 hours ago, Gez said:

"Sound" (as far as the AI is concerned, it's not audio sound) is a sector-based property, so it cannot be blocked by 3D floor. You'll have to do a different room-over-room setup using portals instead if you want to be able to block sound.

Okay, thanks. I'll give it a try as I'm not that good with portals but will experiment on a dummy (test) wad to get the portals right before using them in my actual mod. Thanks again. 👍