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CINEMA 4D is a production tool that is designed to work within a particular workflow involving compositing application like After Effects. Because of that, it has incredibly tight integration with After Effects. One of the abilities that we have is the ability to bring across 3D data, in the form of camera and position information, from CINEMA 4D into After Effects. In order to do that though, we have to add a special tag to our project file for the objects that we want to have inside of After Effects. And right now in this scene, the only thing that we're really concerned about is the screen for the telephone.
We want to have an exact null object that's in the center of the screen moving and traveling with the screen. That will give this the ability to actually place us a video on that screen inside of After Effects that'll move exactly with our 3D render from CINEMA 4D. So what I'm going to do is over here in the object manager, I'm going to scroll down through the object manager and find my phone. There it is, Phone Uber. And within the Phone Uber null is a Phone Screen null object, and I'm going to select that, just so I can identify where it is in space. You can see that there it is right on the face of our phone. And if I right-click on this and go to CINEMA 4D tags > External Compositing, you will notice that it's different than the compositing tag.
This is a special tag that only does one thing. It gets position and rotation information for a particular object from CINEMA 4D into After Effects. So if I add that to my Phone Screen null object, that's all I need to do. I don't need to touch any of the other options for the tag. There are times where you might need these guys, especially, for example, if you were using this tag in combination with the Mograph Cloner object. But in this case, for a simple null setup like this, we only need to have the basic properties. This simple step will give us all the control we need in order to place video on our phone inside of After Effects.
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