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I am currently in production of an rts(realtime startegy game) and i have come across a problem. I have 5 actors, i click to make them move and then they walk through each other and it looks like theres only one actor(there overlapped and wenevr click to move they stay like that) How can i make an actor not be able to walk through another actor?

You could try physical response on collision.
An Idea I though of: use an actor as a 'reference' in the center of all the actors you want to move, and record each actor's position relative to reference. Then move them so their position is in that spot on draw actor, and move the reference. I havn't tried this so I don't know if it would be any use, but you could try it and see.