prop_detail
prop_detail is an internal point entity available in all 
Source games. It is used to manually create a detail prop. It only supports model detail props, so is rarely used.
AltNames: This entity is also tied to detail_prop. Keyvalues
- World model
(model)<model path> - World model to appear as. Must be $staticprop and
UnlitGeneric(ALL skins). Maximum string length: 128. - detailOrientation
(detailOrientation)<integer> - How the sprite will react to the camera:
- 0: It will not rotate.
- 1: It will rotate around its origin to always face the camera head-on.
- 2: It will rotate around its Z-axis only to face the camera.
