Hello, did you find an answer to this please?
maxch
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In my case the problem turned out to be that the projection matrix I was using was not invertible. This causes SCNRenderer's hitTest() and unprojectPoint() functions to fail.
Same problem here. Have tried everything and there is never any result from SCNRenderer.hitTest(). I think there's something in the SceneKit render loop that prepares nodes for hit-testing, and that something is missing when there's no SCNView. Thought it might have been SCNTransaction.flush() but that doesn't help.