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Learn how to create stunning motion graphics and animations for video production. Author Ian Robinson explains how to format and animate type with the Transform Glyph tool and explores Motion's real-time 3D tools. The course also covers working in 3D space, creating depth with lights and shadows, keying green screen effects, and working with particle systems. In addition, Ian offers practical advice on integrating Motion into a professional video workflow and explains how to work smarter using rigs and templates.
An animated paint stroke in Motion is something extraordinarily powerful, because it's kind of like a hybrid between a moving particle system and a replicator. So naturally, that means there are so many options that it'll really make your head spin. Let's check out what we have here with this brushstroke by selecting the brush- stroke and opening the Inspector. Now as you can see when we begin playback with the spacebar, we already have some animation applied to this brushstroke.
And in the previous video, we did go back and sort of ascertain that the animation was created by using keyframes for the First Point and the Last Point Offset. But really, when you start getting into these other channels, like Stroke and Advanced, you'll really see all of the different options that are available to not only animate a brushstroke but also just specifying exactly how it looks. So there are a couple of common themes to the interface. I'm going to go ahead and expand this disclosure triangle for Width Over Stroke.
I know you can't see the whole word there, but that's what that says, Width Over Stoke. You'll have this graph, and it looks just like a typical Bezier curve line. If you double-click on any point in the graph, what you can do is click and drag, and notice now in the middle of this brushstroke-- careful, it gets really sensitive when you start dragging-- in the middle of the brushstroke, I've made things extraordinarily skinny. See, as I continue to drag down, I'm getting a direct representation of this width of the stroke getting adjusted accordingly.
Now if I right-click on here, I can adjust the Interpolation from Linear to Bezier. And then here, I'll actually have the handles that I can adjust and really kind of smooth things out or make it more drastic in the adjustment. So you'll find that repeated throughout the interface here. Now when it comes to actually animating brushstrokes, you want to go over to this area, Advanced. See under Advanced, we have Dynamics, and the Dynamics are really kind of interesting because this is where brushstrokes can take on that particle-emitter property.
See if I crank up the Speed here, look what happens to my brushstroke. Isn't that cool? Basically, if we check out our animation, you'll notice it looks sort of like a particle system moving through the scene. That's pretty neat. Now we could definitely keep going in making more adjustments through the Dynamics here, but I think you understand, with Dynamics enabled, you can create more of a particle-animation look to your brushstrokes. Now these other options here, Pen Pressure and Pen Speed, these you can adjust based on input from a Wacom tablet.
Now, under Geometry, this is where you can see all of the individual control points that make up this line. Most of the time when it comes to animation, I don't mess with this too, too much. Really, when it comes to animating brushstrokes, I usually adjust settings in the Advanced tab. Occasionally, I'll keyframe settings in the Stroke area, and under Style, definitely keyframe the First Point Offset and the Last Point Offset. Now before we end things, I just want to show you one last behavior out of the Library.
So when you have a brushstroke like this, you can go to Behaviors and in Shape, any of these the Shape behaviors can be applied to this brushstroke as well. The reason I bring this up, if you want this stroke to appear on the screen and sort of shake around, you can choose behavior like Wiggle shape. Now the one I use most often is right here, Write On. See, if I drag this and drop it right onto the paint stroke, now I can control the animation based on the Write On parameter.
Now I've got kind of a double-whammy effect happening here because it's writing on with the behavior and I still have keyframes under Shape. Under Style, I still have my keyframes for the First Point Offset and the Last Point Offset. So just so you can see what it looks like, I'm going to reset this parameter and reset that parameter, and now you can see it's only the behavior that's creating this brushstroke. So as it goes through, you can see this is being adjusted by the behavior.
So I hope that wasn't too overwhelming with all the different options. Just remember, when it comes time to animating brushstrokes, really you want to be looking in the Stroke area, the Advanced area, or using one of the behaviors out of the Shape area and Behaviors.
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