There is no conditionstate that relates to "stealth".
Stealth is controlled by the object's status.
The NIGHT ConditionState demands a W3Dmodel and can't be defined by an object with a stealth behavior.
I don't see a way to achieve your goals...
There is a set that calls STEALTHED etc but what the problem is for a new model is like RNG when stealth tank is stelathed a nice stealth effect must roll over it but no smooth fadeing of an opacity i want to have the nice nice stealth effect
You're wrong... There is no ConditionState STEALTHED, however, there is a status STEALTHED.
The status is nothing more then a flag that makes the game understand in what kind of state the object is in.(if stealthed is flagged, you can't include me into you field of view)
The conditionstate then uses it to display the model. You problem is that the flag is there, but that you have no way to display it.