Outdoor levels
Todo: If anyone would like to participate in creating this that would be nice, because I would like to see different ways of making outdoor levels.
Outdoor levels in 
GoldSrc refers to levels that feature outdoor environments and terrain. Unlike 
Source Hammer Editor, which features the Displacement Tool, terrain must be created manually for levels, often employing the use of the Vertex Tool.
For an outline of the topic see: Environmental Lighting, Sun, Weather, & Outdoors
