The GoldSource engine is actually pretty agnostic about models, and the same
model
entity key is used to reference all of
brush entities, models, and
sprites.
You can perform shenanigans such as using
zhlt_usemodel
to have a
func_healthcharger
use a .mdl model, or a
func_train
display a rotating sprite, which is otherwise statically oriented, by using
avelocity
.