When trying to preview a composition in 3d (like you see when people are doing tutorial videos), whenever I click on the preview (whilst attempting to move the camera around in the scene to preview it), the preview stops (due to clicking the mouse button).
In other words, I cannot play back a preview and manipulate the camera at the same time. Again, in most tutorials I see online the "teacher" is manipulating the camera while also previewing the scene they are discussing. I can't do this as every time I click the mouse to manipulate the camera, the preview stops due to the mouse click.
I'd like to know the tutorials where they do that!
To my knowledge, the best you can do is to create a camera in AE and preview using the Active Camera view.
I think I may be losing my mind....here it is 2am in the morning. : )
Your post made me double check what I was looking at, and I think I was wrong. I was watching a Trapcode Particular video tutorial and perhaps all of the 3D particles in the scene gave me vertigo! In any event, I think this case can be closed as quickly as it was opened.