Somebody tell me how to make a skybox in UDMF

[Braxton]

So, I've created an inaccessible sector with a skybox viewpoint, and the skybox is still what I'm seeing on the screen whenever I noclip out of the spawn room to see if it worked. Note that I'm confused on everything that the wiki has told me, I'm a beginner map maker. I've included an image file of my map here:

dm.PNG

'

[Nevander]

Make sure the playable sectors you want to have sky has F_SKY1 as the ceiling flat. Otherwise you won't get a skybox anywhere in the map.

I see you used SKY1 as the flat for the skybox sector... you probably shouldn't and instead use that texture for the skybox walls instead (unless you did already, in which case ignore what I said although I'd still change the floor to something that blends better with the bottom of the mountain texture).

Also one last tip, I'd give the skybox viewpoint an angle of 0, so it's facing east. This allows the in-game skybox direction to always match the map when facing north, so you can add things into the skybox later without getting confused on directions.

[Braxton]

Thanks, it's working now, though when I look in some directions outside the playable sectors the skybox is gone

[Remmirath]

With "Outside the playable sectors" do you mean the black areas around your playable sectors? In that case, that's normal.

The sky in Doom is only visible in sectors that use the F_SKY1 flat on either the floor or ceiling. The fact that you sometimes can see the sky when looking outside the playable areas is due to how the renderer works (I assume you're using OpenGL). If you were using software, you'd only see HOMs in unmapped areas.

[Braxton]

Here's some footage of the problem on my stupid troll channel:
https://youtu.be/FEBEWKXBXUc