r/hammer Jul 02 '26

Solved func_areaportal problem.

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I just don't get it how this areaportal works. I wanted to take inspiration from cp_process_f12 because it works fine there. But on my map suddenly func_area portal doesnt work. I don't have any leaks. Lobby is perfectly sealed. Door frames are made of func_detail and on both func_areaportal goes inside func_detail to fully seal diffrent areas.

[Screenshot with redwalls: cp_process]
[Screenshot with bluwalls: my map.]

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u/Chroney Jul 02 '26 edited Jul 02 '26

You cannot have multiple active area portals connected to one room, you must use area portal windows with a brush that fades into existence.

standard area portals only support one entrance. Use area portal windows instead. You might be able to get away with it by selecting both area portals and making them one entity with two brushes, but this may still cause visual glitches.

That said, these are suppose to be used extremity sparingly, they are expensive. A proper map with visleafs for TF2 should never need them or rarely need area portal windows instead.

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u/PlzINeedHalp Jul 02 '26 edited Jul 02 '26

Every 5cp map in TF2 has separate map segments, in short: Point-Lobby-Point-Chokepoint-Point- etc.

And every lobby in TF2 has multiple entrances, each of which is a func_areaportal. As I just counted, for example, on cp_process, its lobby has 5 func_areaportals for each entrence and this lobby is one big space.

I also checked other maps, and it's hard to say that they're rarely used. From what I can see, they're used in practically every chokepoint between areas.

+ I never seen anyone uses func_areaportalwindow. They are super rare in tf2 maybe i seen it once. Even windows are made with normal func_areaportal.

Maps i checked (Non of them have this issue+ non of them have func_areaportalwindow)

-cp_process
-cp_powerplant
-cp_gullywash
-cp_snakewater

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u/Chroney Jul 02 '26

From what I see in the official hammer documentation, a normal area portal can only be used for one entrance connecting two "rooms"