When triggered, this entity produces a cone of sprites that get sucked into a point, as seen in the Half-Life disaster sequence.
Name (targetname) - Name is a general attribute used to identify entities.
Reverse (1) - If enabled, the motion of the sprites will change to be a puff of sprites that expands outwards. (This effect is also seen in the disaster sequence.)
Although the effect produced by this entity is somewhat unique in Half-Life, this entity does suffer from a lack of options. You cannot define how long the effect lasts, the colour or size of the sprites, the size of the cone, or the direction the effect occurs in.
This entity can only be triggered once. If you require the effect more than once, you will have to use more env_funnels.