[Meshes] Portals article

[muczc1wek]

Demo

[kamilkrzyskow]

The list at the end also seems overly complex, but here is my limit, I don't know how to simplify it 😢
Once you resolve my comments, then request auronen for review 😆

Also how to check if the portal is working other than, you know, looking at it, not seeing it etc?
Is there a way to get a log message when a portal doesn't work according to the engine, or does the engine not keep track of such things?

[muczc1wek]

Also how to check if the portal is working other than, you know, looking at it, not seeing it etc?

I think if the portal doesn't work it A - couldn't be passed B - provide weird graphic glitches