Join Angie Taylor for an in-depth discussion in this video Basic concepts, part of Stereoscopic 3D Motion Graphics with After Effects.
Hey, my name's Angie Taylor, and I'm here to take you through the stereoscopic 3D workflow in After Effects CS 5.5. And in particular, we're going to have a look at how you can composite stereoscopic 3D footage into your After Effects composite. And combine it with graphics. Now I've some footage kindly donated by Artbeats and you'll see it if you open up the stereo 3D or 7 project, which you can find in the projects folder. Inside there, there's a composition called Distance Test, which is one we're going to start with. But you can also open 05 stereo 3D, to stereo 3D. And have a look at what we're going to create using this lovely Artbeats footage and compositing some graphics in front of it.
And you can see what stereoscopic 3D footage looks like here, kind of has this red blue separation thing going on. If you're unsure about how it works, let me just take you back a few steps. If you open up this distance test composition and hold up a pen about halfway between you and the monitor, we're going to follow the instructions on screen. So hold a pen halfway between you and the monitor and line the pen up with the white rectangle with both lines open so that the pen kind of overlaps it.
Now once you have it there, try and keep it still and then close your left eye. And you'll notice that the pen jumps, when I close my left eye it jumps to the left. And its position appears to change, it doesn't change, of course, cuz your hand's still still. And then if you repeat the process closing the right eye, the pen may also change a little bit to the right as well. You might notice that one eye is not so apparent as the other, the difference in position. So if you also, once you've noticed that, try it with the pen closer to you, but still overlapping the shape. And you'll notice that the difference is more pronounced, the closer the pen is to you and that's because the distance between the pen. And the line on the screen is greater if you move the pen closer to the line on the screen and close.
Open enclosure, left and right eyes you'll notice that the difference isn't as great, and this is how your eyes measure distance. They measure their view from each of the eyes. And then they bring those views together, the distance between the two objects tells the brain how far the object is from you. I heard a story on someone elses tutorial about study of 3D, they said that that's why they reckon birds move their heads from side to side. Because their eyes are on the side and they can't tell the distance of objects.
So by moving their heads from side to side they can see things from two different views and start to understand distance. So, anyway that's a basic concept. Now the other thing is if you could physically move the pen behind the screen. You would notice that you get the opposite thing happening, so the pen will move to the opposite side. When you close the left eye, it will move to the right instead of the left. And now, if you had three hands, you could hold up three objects and you could test that for yourself. But you could hold up two pens in a line in front of the screen and try opening the different eyes and notice the difference between the three objects.
Now that's the basic principle. And I'm going to show you in the next movie how After Effects recreates this kind of optical illusion. If you like, to give the viewer the sense of depth when they're watching stereo 3D footage.
- Basic concepts of stereoscopic 3D
- Faking 3D tracking
- Adding effects, transparency, and styles
- Compositing stereo 3D footage
- Adjusting depth settings
- Applying finishing touches