Custom Materials Created 18 years ago2006-03-07 01:39:56 UTC by J3r3my

If I use some custom materials that I made in a map do I have to use some command (like -wadinclude in HL1) or does it automatically add them to the BSP?

You'll have to use a tool called bspzip, which is already in your SDK bin folder. However, there are more user-friendly versions of this program like WinBSPzip and PakRat available. PakRat has a function that scans the map for files that need to be included (models, materials, sounds...), for example.