I've done some mapping before with the Hammer Editor, but this is the very first time making a 2D skybox. My problem is that though everything looks ok into the editor, when running the map in the game the skybox doesn't show, leaving instead this blurry stuff.

http://i.imgur.com/4hoB5fr.jpg

I've tried following three different tutorials for this, checking all the details on the Developer Wiki, following all the steps as they are explained, and even just restarting both the editor and the computer (when you're out of ideas...). Do you have any idea what may cause this?

If you did; is it a custom texture?
Did you download it from the interwebs?
Check the vmt files. Portal 2 has a broken sky material ;
make it an unlitgeneric:

unlitgeneric
{
$basetexture "skybox/stars01"
}

Is what you need to have; make sure to change your $basetexture to the proper texture

I'm a little in a hurry right now, but later I will try that and let you know, thanks!

josepezdj wrote:
That blur looks like a leak in your map

I don't really think so. As a test I tried making the simpliest map possible, a classic hollowed out cube, and still I have that problem.

Anyway, I've had a look into the pak01_dir.vpk file with GCFScape, and didn't find the textures I tried to use in the Skybox directory. There were indeed just a few ones, like sky_black_nofog, sky_fog, sky_white. I tried to use one of those, and it does work, though the sky just being a solid color. Is there any way I can get to use one of the skies listed on the Developer Wiki?

Askie wrote:
Is there any way I can get to use one of the skies listed on the Developer Wiki?

Of course. If for example you want that sky you mentioned, sky_day01_01, all you need is HL2 or maybe Portal, as the wiki says this skybox belongs to those Open the "source materials.gcf" and extract your skybox from the /skybox folder.

Now you only have to place the files into your portal 2/portal2/materials/skybox folder and add the name of the desired skybox in your map's properties.

Also you might have to change a bit the .vmt files as Lp said above... check out into them and if they say "sky" at the top, change it by "UnlitGeneric"; then delete all lines except the one for the $basetexture and you'll be done.

But I think I have a version of that sky already patched for Portal 2, it was part of a mod that never took off. I'll see if I can find it.

I finally managed to make the skybox work! But there's a new problem. When it didn't work, the game worked normally though; now, with the skybox working, this happens:

http://i.imgur.com/EGP20qZ.jpg

The character is floating in the air, with no possibility to move, and the ground looks lacking of textures. I tried a few things, but still nothing. Any idea how to solve this thing? Sometimes I feel like I'm the only one having so many problems doing something so simple.