Actor created upon unit death, but only if Upgrade is researched?

[X-maul]

I got an actor that plays when a unit dies, but I only want it to play if the owner of the unit have researched a specific upgrade.

I asume it's a validator, but I do not really understand how validators work.

 

[Dave312]

Validators are basically just a condition. In this case, you need to create both a validator and a requirement. Create a requirement that checks if the upgrade has been researched, then create a validator of the type Player Requirement which references your requirement. Then in your event that creates your actor, add a ValidateUnit term which references your validator.