I’m very new to mapping, but eager to learn.
But now, to complete my first map, I want to make a road, but I can’t find any textures.
I realized I had HL2 as the “config”, and tried to change to CS:S, only to find out, it doesn’t change.
In the Current Game dropdown box, I select CS:S, then I start Hammer.
No errors or anything.

Worked for two days ago, when I first started Hammer.

Whats wrong?

Look up ‘concrete’ in the hl2 configuration. You will find a road.

This issue is somewhat common when it comes to the sdk. There has yet to be a fix as far as I know. Try deleting your steam\steamapps\username\sourcesdk folder.

Why didn’t you just ask me on steam?

You just came online.