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Hmm, do you even now why it doesnt works? ^^
In the example, you see 6 Worldbrushes outside. These Worldbrushes "Closes" the map from the void.
Otherwise the map will have a leak. And every map must be closed. (Otherwise vrad (a file from the compile process) will say "Leaked entity in ... ").
In my example the room is VERY tiny. You could just expand the 6 outside worldbrushes to make the map larger, and then your models should fit in. OR you just make 6 Worldbrushes in your map, who will "Cover" the map from the void.
Here an site from the vdc: https://developer.valvesoftware.com/wiki/Leak
Maybe you now know more about that 
TheTestmasterSphere wrote:
I'm looking at the VDC, but I can't select only one side of a brush. D:
VDC is an Internet Site, or what the heck are you trying to do? 
What I meant is that:
1. I read the tutorials at VDC
2. I seem to be unable to select only a single side of a brush in hammer.
(This message took too many edits to fix)
Did you now fixed your problem?
TheTestmasterSphere wrote:
Nevermind. I realized Noobishness got to me and that you can't select individual sides
Use the face edit tool...
Hey @Sphere, if i where you i would first learn the basics of hammer, the basics of the tools, how maps and brushes are working, and how to change textures.
That all you will learn in some tutorials, and some sites on the vdc, for beginners.
Or watch some videos from tophattwaffle, because where i started mapping, i looked how i make a room with a button and a door. And not starting bts maps
TheTobbell wrote:
He started mapping in hammer, "hm well, first i will make an exterior map"Hey @Sphere, if i where you i would first learn the basics of hammer, the basics of the tools, how maps and brushes are working, and how to change textures.
That all you will learn in some tutorials, and some sites on the vdc, for beginners.
Or watch some videos from tophattwaffle, because where i started mapping, i looked how i make a room with a button and a door. And not starting bts maps
In addition to tophattwaffle, I also recommend solarchronus's channel
TheTestmasterSphere wrote:
I'm making something that is truly good enough for science. May not be aperture-quality science yet, but hey, it's a test chamber!Cave Johnson wrote:
This is a test chamber. Four walls, ceiling and a floor. Good enough for science. Not Aperture Science.
When I saw that I just had to post that, sorry if it makes you mad,
I'll delete this post if you want me to if I am able.
JoeyGuy917 wrote:
TheTestmasterSphere wrote:I'm making something that is truly good enough for science. May not be aperture-quality science yet, but hey, it's a test chamber!
Cave Johnson wrote:
This is a test chamber. Four walls, ceiling and a floor. Good enough for science. Not Aperture Science.
When I saw that I just had to post that, sorry if it makes you mad,
I'll delete this post if you want me to if I am able.
I was actually thinking about that cave johnson line when I wrote the post.