I'm fairly new to AE, so this is probably something easy.
I used Particular to create a 360 degree starfield in it's own composition. It works great, I can pan around with the camera and everything is fine. But I copied and pasted that layer into a different comp that has other layers in it, and now when I use the camera, everything else moves, but not the star field. In the first comp that I created it in, the layer is not a 3D object, so I do not have it as a 3D object in this one either. The camera is above this layer, I haven't changed anything about it since pasting it into this comp. What am I missing?