Seen several posts on this but I don’t have a conclusion why it’s not working.
Do Draw Rect & Get Actors in Sel Rec work together ? (using both in HUD)
If your using the Node that Rama got put into the Engine, i have noticed it does seem to not work correctly at different camera angles.
I chose to implement my own solution because of this issue.
I get all Actors screenspace location and then check which ones are within my Rectangle coordinates. Those that are will be checked as selected when finished using the Box selection.
You will notice that many RTS games do it this way and rarely use the whole bounds of the Actor to check for selection, which is one of the drawbacks to this technique. If your Actor is partially within the selection box but its Origin location is not, it wont be selected.