Scene Node \ Overlap Node Enter Node The Node Enter Node event is triggered when Scene Node A enters Scene Node B. Both nodes can be any nodes in the assembly tree — for example, Node A could be a screwdriver and Node B could be a screw. Node Exited Node The Node Excited Node event is triggered when Scene Node A exits Scene Node B. Both nodes can be any nodes in the assembly tree — for example, Node A could be a screwdriver and Node B could be a screw.