one is to put only one key to the parameter so that when ever it's off the key, object will disappear.
the other is to put usual 3 keys and put another key right next to the left key where the left key has 100% opacity and all the other 3 keys have 0% opacity.
Comments
i think there are two ways to do it.
one is to put only one key to the parameter so that when ever it's off the key, object will disappear.
the other is to put usual 3 keys and put another key right next to the left key where the left key has 100% opacity and all the other 3 keys have 0% opacity.