From the course: Cinema 4D R23 Essential Training: VFX

Solve the 3D camera - CINEMA 4D Tutorial

From the course: Cinema 4D R23 Essential Training: VFX

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Solve the 3D camera

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- [Lecturer] Solving the 3D Camera involves coming over to the 3D Solve tab and then choosing a solve mode. Before we continue, if you can't see the footage click the ellipses button and load the street shot from the Exercise Files. In most cases you will select the Full 3D Reconstruction mode where the camera changes it's position and there is a parallel shift. There are other modes but they're just not our current focus so we'll just leave it on Full 3D Reconstruction. Before we run the 3D solver, if you knew anything about the camera used to film the shot, such as the focal length, or the sensor size, you would input that data here. I don't know the exact details about this shot, so I'm just going to leave it alone. And if you were to enter incorrect data the camera solve would be really bad, it's just not worth it. So I'll leave it on Unknown but Constant. And then we scroll down and well click the big button here that says 'Run 3D Solver'. That's going to calculate the 3D position from each track. And when the solver has completed if we switch to a 3D View, so we come over here, just click over into our 3D view we can now see each feature is represented by color-coded null objects. And we can just twirl this down we get our user features here and our outer features and if we scroll down, see they change from green all the way through to red colors. So let's just play this through, and those features are locked on to various parts of the footage. We can come out of the Solve Camera here and you get to see a 3D representation of the same. Let's come back into that camera. If you're happy you can lock the Solve Data. I'll just pause the playback, the thing we want to verify, if we click on the Solve Camera is that we have key frames on every frame and we're looking at the position and rotation values and also the Focal Length, Key Frames and Sensor Mode also. So if we hadn't taken the steps, in the previous movie to refine the tracking data is likely that we would have a very poor camera solve and we'd run into trouble with this shot later. It's important to create a coordinate system so that the data can be used in a meaningful way. So let's look at that next.

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