Adding an atmosphere
From Mod Wiki
The atmosphere entity essentially adds a ‘sky’ to the map. Its location in the world doesn’t matter. Add an atmosphere entity and give it a key pair of atmospheredeclarea22_01. This is a nice bright, clear day. In order for game components to behave correctly later on, we need to define an outside area in our map.
- Like the caulk hull, by using 6 brushes, create a small room from textures/common/caulk underneath the terrain.
- Texture one of the brushes with textures/common/nodraw, and nudge the brush inwards so the outer face is flush with the adjacent four sides.
- Now texture the outward face with textures/editor/outsideportal.