Currently, your Convai Metahuman blueprint works with the following logic:
To make the metahuman look at me (HMD location):
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Start the game.
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Approach the particular metahuman. I should be within their volume.
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I should look directly at the particular metahuman (not at some random area on the map).
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I should press a button to start talking.
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Right after I press the button, the NPC will immediately start looking at me.
What I want:
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Start the game.
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The NPC should look at me (HMD location) without any conditions regarding my location or the buttons I press.