Usage:
   ObjectTemplate.AlphaTestRefOverTime time/x[|time/x...]

Argument values:

Description: This property is used exclusively in Battlefield Vietnam.

Related properties: ColorRGBAOverTime, DestBlendMode, DragOverTime, GravityModifierOverTime, InitRotation, RotationSpeedOverTime, SizeOverTime, Texture

Used in object types (and how often in each type): SpriteParticle (18%)

Used in a total of 69 .con files: Effects.con

Parent directory of these .con files: vietnamObjects/Effects

Example: (from vietnamObjects/Effects/e_treadgravel/Effects.con)
   rem *** Fx_treadgravel ***
   ObjectTemplate.Create SpriteParticle Fx_treadgravel
   ObjectTemplate.TimeToLive CRD_UNIFORM/1/1/0
   ObjectTemplate.Size CRD_UNIFORM/0.1/0.2/0
   ObjectTemplate.GravityModifier CRD_UNIFORM/0.5/0.3/0
   ObjectTemplate.Drag CRD_NONE/0.4/0/0
   ObjectTemplate.SizeOverTime 0/0.160024|25/0.389996|47/0.5|71/0.370006|100/0.110004
   ObjectTemplate.GravityModifierOverTime 0/1
   ObjectTemplate.DragOverTime 0/1
   ObjectTemplate.Texture e_gravel_mb_01
   ObjectTemplate.InitRotation CRD_NONE/1/360/1
   ObjectTemplate.DestBlendMode BMInvSourceAlpha
   ObjectTemplate.XYSizeRatioOverTime 0/1
   ObjectTemplate.RotationSpeedOverTime 0/1
   ObjectTemplate.ColorRGBAOverTime 0/255/255/255/255|6/244/244/243/247|75/129/125/113/165|82/118/114/100/118|100/106/102/89/0
   ObjectTemplate.AlphaTestRefOverTime 0/1