I created a new project based on 3rd person blueprint and a test actor. The test actor has this line of code,:
https://forums.unrealengine.com/attachment.php?attachmentid=135788&d=1491205691
It will print “ON SCREEN” if the actor is on screen.
The test actor has the default billboard dino head image. It is placed towards the right side behind the player character so it doesn’t appear on viewport initially.
Somehow the “ON SCREEN” message will be printed even when the test actor is not within the viewport. I tested it in standalone game.
Below is the link to download my project file:
EDIT: Fixed link