Join Chris Meyer for an in-depth discussion in this video Setting the ground plane and origin, part of After Effects Apprentice 19: Motion Tracking with CINEMA 4D Lite.
- [Voiceover] The next thing we want to do…is to find the ground plane in the scene.…We want to put our crown on the ground.…To do that we need to know where the ground is,…or even better, it'd be nice to pick a point…where we intend to place our crown…and call that zero, zero, zero.…The origin of our world.…So I'm going to scrub my current time indicator…until I have a nice view of the ground.…Somewhere around here is fine,…and as I move my cursor over this footage…with the camera tracker effect selected…you'll see After Effects automatically tries to triangulate…between the three nearest track points.…
You need a minimum of three points to define a plane.…However, it's even better if you…can use more than three points.…After Effects will average them together…to get a more accurate result.…So I'm going to start dragging my cursor…and lassoing as many of these points as I can on the ground.…I don't want to go up on the bank…and start getting some of those…because not all of these points are on the ground.…I only want ones on the path.…
The first course in the series, After Effects Apprentice 17, includes an overview of the C4D Lite user interface, as well as important setup information you need to know whenever you use live C4D layers in After Effects. We recommend you watch it first if you have no prior experience with C4D.
- 3D camera tracking
- Setting a ground plane and origin
- Merging an After Effects camera move into a C4D project
- Adding a 3D model to the scene
- Casting and compositing shadows
- Improving the final composite