The Source SDK tools give access to hundreds of different models, sounds, and materials. Half-Life 2 is based on a post-war, apocalyptic environment, and most of the materials include some wear, grunge, and destruction. If your mod does not follow this theme, you'll probably want to add some of your own content in the maps.
In this chapter, we will be learning the following topics:
Creating materials
Importing materials
Importing models
Importing sounds
Let's jump in!