Materials for hl2 ep 2?

Now im guessing that this question has been asked allot of times here around the forum or others but since the search option is as a matter of speach no option. I wanted to know where do you place the materials (that you made yourself or others) to use them in the sdk ep2 engine?

Btw: is this in the wrong section? And if it is would someone kindly show me the right one?

If you want them to show up in-game put them in steamapps/<user>/half-life 2 episode two/ep2/materials/

thank you

I"ve tried to find this folder and noticed that it doesn’t exist. Any idea’s on other solutions? (I dont think making one will help.)