Making Portals in DOOM II

So, I need to know: how do I make portals in (specifically) the GZDoom: DOOM II format. I am not referring to the GZDoom: DOOM II(UDMF).

I made some very clunky portals, but i want them to look and act like the ones in this video: 

The thing is, when he sets the action for the linedefs, I cannot seem to find anything with that name or action number.

Because he's using UDMF 

If you want portals in GZDoom, you pretty much have to use a more advanced format such as "Doom II (Hexen format)" or "Doom II (UDMF)". The format you're using, "Doom II (Doom format)", is much more simple - as a result, there are many advanced features that it either supports in a very crude way (slopes for example), or lacks entirely (Portals as shown above).

On 6/18/2023 at 9:39 AM, TheGamerNinja556 said:

So, I need to know: how do I make portals in (specifically) the GZDoom: DOOM II format.

 

You don't.

If you're using the Doom II format, it means you can only use things which were possible in the original release of Doom II. That game did not have portals coded in, which is why you cannot find the action. It doesn't exist in that format.

Can you make a WAD in Complvl 9 but the first 11 maps are in reggy D2 format and the later ones are Boom; the whole thing gets saved as Boom, right right? ?

On 8/29/2023 at 12:54 AM, LoatharMDPhD said:

Can you make a WAD in Complvl 9 but the first 11 maps are in reggy D2 format and the later ones are Boom; the whole thing gets saved as Boom, right right? ?

you can mix map formats on a level by level basis.