One of the most flexible ways of creating movement for virtual reality is Keyframe Animation. Now this is a method that goes back to the really early days of animation, the early days of Disney and the animation studios. And how they created animation was that they drew a lot of images, and each image was subtly different from the previous one so that when you played them one after the other it looked like movements. So this was a fantastic way of creating the appearance of movement. But it was a lot of work. You had to draw lots and lots and lots of images. Films typically run at 20 frames a second, 24 frames a seconds. That's 24 images per second. So it's an enormous amount of work. Luckily, on a computer it becomes a lot easier because we're not drawing images anymore. We're dealing with objects, and we're dealing with objects with transforms. And actually, most the time the only thing we need to animate is the transform. We keep the object the same, but we translate and rotate it to make it seem to move. So each keyframe is the same object with a different translation and rotation. So that's really nice. And we can do a lot better than that as well. So one of the big problems that they had in the old days of animation was that the amount of time it took but also it was really hard to split up the work because if you gave Snow White to two different animators, well, it would look different when the two animators did that, and they came up with a really clever solution to that. The thing is if you look at an animation, actually, all you need to understand an animation completely is just a few frames. You know, these seven frames describe a jumping motion pretty well. But if all you had was the seven frames, it would take less than a third of the seconds, it would be far too slow. You need stuff in-between those frames. But the stuff in-between those frames is just pretty straightforward. You just kind of, it's just through slight variations of what you've already got there. So the lead animator could do these important frames, what we call the keyframes, and you can get assistance to do the in-between frames or sakobi inbetweening. So that's where the word Keyframe Animation comes from. On a computer, it's even easier, because the computer does the inbetweening. So if you're creating an animation, all you need to do is create a few keyframes and the computer will generate you a lovely animation in real time that will move nicely. So, animation like this is one of the key benefits. So unlike physics, you're not constrained by the laws of physics, and also you can do much more complex animations than you could do with a physics simulation. So, it's well worth trying out a little bit of Keyframe Animation, and even if you decide that you're not going to be an animator yourself, there's loads of very good animation out on the asset store that you could be using.