Entity
An object defined within the 
Source or 
Source 2[confirm] as having characteristics which differentiate it from "the world" (world brushes).
Contents
Types
by form
Exclusive to Source and earlier
Brush entity
A Brush Entity is an entity type in the 
GoldSrc and Source engines, created by tying an entity to a BSP geometry brush in the map, giving the brush a specific effect or ability defined by the entity tied to it. (The default shortcut is Ctrl + T after selecting a brush)
Source and Source 2
Point entity
Point Entities are entities created at a specific position point on the grid. Some require a model to be selected for them in order to function fully.
Brush entity - the other type of entity, that consists of a set of brushes.
Exclusive to Source 2
Mesh entity
Mesh entities replace the Source brush entities. Since Source 2 no longer uses BSP brushes, entities that need to be associated with geometry are now tied to Hammer meshes instead.
Path entity
Path entities are a type of entity recently added to the tools. They can be created with the currently hidden Path Tool (Shift + P).
by internality
Limitations
Warning:Entity limitSee Also
- Category:Entities
- Adding Point Entities (part of a series of tutorials)
- Creating Brush Entities (ditto)
- Entity creation (a quick reference)
- Entities in Depth
- List of Entities
- Coding Your First Entity
- Console command
dump_entity_sizes - Constraint
- preserved entity
- Void
