Does all textures from all source games i’ve got show up in hammer?
I’m using the Orange Box engine.
If so, can i in any way filter so that only the DoD:S textures shows up?

If you are mapping in DoD then only DoD textures appear.

Unless you manually place all of them in one game.

Or edit the gameconfig(I think :ohdear:)

You can’t have more than one game configuration loaded up in the sdk at a time.

Pretty much you can’t have the gameconfig mount CS:S and hl2:ep2 at the same time, you would need to add in the textures manually.