Doom-64 style sky rendering?

[Jaxxoon R]

I swear I remember this... either a linedef or sector action that made skies not obscure things behind them. I think graf mentioned it in a thread once, which is where I learned about it initially, and I recall it working back then. I just can't remember the action number nor can I find the thread.

[Graf Zahl]

Yes, there's a sector special type for this. Behold the info in the Wiki: 89 GLSector_NoSkyDraw