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Using the ReelSmart Motion Blur effect

From: CINEMA 4D: Rendering Motion Graphics for After Effects

Video: Using the ReelSmart Motion Blur effect

Our work is almost done. The last step in the compositing process is going to be to add something called motion blur. Motion blur is actually a visual artifact that occurs when the camera takes an image and an object moves through the frame while the shutter is open. It's actually a really desirable effect in a lot of cases and it adds realism, especially to 3D images. 3D images are generated without motion blur normally and it can be very time-consuming in a 3D render engine to add that motion blur back in.

Using the ReelSmart Motion Blur effect

Our work is almost done. The last step in the compositing process is going to be to add something called motion blur. Motion blur is actually a visual artifact that occurs when the camera takes an image and an object moves through the frame while the shutter is open. It's actually a really desirable effect in a lot of cases and it adds realism, especially to 3D images. 3D images are generated without motion blur normally and it can be very time-consuming in a 3D render engine to add that motion blur back in.

So there's an excellent third-party plug-in called ReelSmart Motion Blur that allows us to add in this motion blur artifact without having to do it in the 3D render and so it makes it much easier to adjust the intensity of it and also to turn it off or on if we decide we don't like it. So we're going to do that in this step. So I'm inside of the render composition and I've got my Shake layer selected, and I'm going to go to the Effect menu and go to the RE:Vision Plug-ins and add ReelSmart Motion Blur.

There are several different versions here. We're just going to use the basic version. And when I add that, I'll scrub through to a point in the animation where, for example, camera shake is happening. Let's scrub to that point in time, which is right about here, and I'm going to turn the filter off and on so you can see the effect. You can see our image is very blurry. And if I turn it off and on, there is a lot of blur that's happening to the image. Let's zoom in. I'll zoom in so you can really see what's going on, just especially up here in the corners.

What it's doing is it actually analyzes the direction that pixels travel from frame to frame and it blurs them based on the blur amount value. And so we want to have this effect. And the default value for this is actually pretty good. There is an issue with ReelSmart Motion Blur that I know about from experience and it's caused when objects get too close to the camera in the actual frame. So I'm going to use the Comma key on the keyboard to back out. I'm going to go to the very beginning of the animation. You can see that there is going to be some weirdness that happens over time.

So what I want to do is to keyframe the intensity of the ReelSmart Motion Blur effect so that it starts off at 0 and goes up to 0.5, and I want that to happen to over about 10 frames. So let's go to the ReelSmart Motion Blur Amount and I'm going to go Page Down until I get to frame 10. There we go! 9, we started at frame 0, so that means 9 is the actual 10th frame of the animation. So I'm going to click the stopwatch here. So that's where I want my animation to go to.

Now if I hit the Home key, I'm back at the very first frame and I'm going to set the motion blur amount to be 0. So now what will happen is as I page down through the animation, the motion blur effect will come on slowly and we'll get a lot fewer of these weird blur artifacts that happen to swish the image around because the blur filter can't deal with all that intense motion so close to the frame. So I'm going to repeat that process at the end of the animation. So if we go all the way to the end-- and I can select this layer and hit O on the keyboard.

That takes me to the very last frame of that animation. You can see there is all that swishing that I was talking about. I'll zoom in on that so you can see it. That's a weird artifacting that occurs. We don't really want that to be visible on our video because that's going to make that transition really weird. So I'm going to back up 10 frames, Page Up for about 140. I'm going to set a keyframe for the motion blur amount. So if I select this layer and hit U on the keyboard and I'm going to add a keyframe for that, and now I'm going to hit O on the keyboard to get to the last frame of the actual layer, and I'll set the Blur Amount to be 0.

Now, if I page up and down through that, you'll see that the Blur Amount starts to dissipate over time. That makes our transition into the full screen video much more smooth. So that's the last step of the compositing process. The ReelSmart Motion Blur filter should always be the last thing on so that it affects all your layers in a single precomp at once. Now, normally at this point in the process I would do a RAM preview. But in the next movie, we're going to be doing our final render so we can see our animation in all its glory.

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This video is part of

Image for CINEMA 4D: Rendering Motion Graphics for After Effects
 
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  1. 5m 48s
    1. Welcome
      57s
    2. Using the exercise files
      50s
    3. Essential plug-ins
      4m 1s
  2. 51m 44s
    1. Essential render settings
      6m 24s
    2. Setting up an object buffer list
      6m 17s
    3. Creating object buffer tags
      10m 48s
    4. Setting up multi-pass image layers
      5m 37s
    5. Creating an external compositing tag
      1m 47s
    6. Creating render passes using the Render Elements plug-in
      9m 39s
    7. Using Render Elements to optimize render passes
      5m 12s
    8. Batch rendering
      6m 0s
  3. 31m 33s
    1. Importing files and organizing an After Effects project
      6m 58s
    2. Creating a 3D object precomp
      3m 15s
    3. Attaching a video layer to a 3D object
      8m 17s
    4. Compositing 3D text
      2m 47s
    5. Compositing a dynamic 3D background
      4m 23s
    6. Setting markers for major events
      5m 53s
  4. 39m 46s
    1. Adding the Star Glow effect to a layer
      4m 32s
    2. Creating a glow on the stadium background
      5m 56s
    3. Revealing the background glow using a 3D layer mask
      7m 19s
    4. Creating a glow using the Ambient Occlusion pass
      6m 9s
    5. Using the Ambient Occlusion glow to create an energy animation
      4m 25s
    6. Creating a stadium light effect using object buffers
      4m 38s
    7. Adding flash bulbs with the CC Light Rays effect
      6m 47s
  5. 53m 16s
    1. Creating the phone reveal
      5m 10s
    2. Creating the phone reveal glow
      7m 49s
    3. Creating the phone reveal beams
      7m 17s
    4. Colorizing the energy beams
      6m 21s
    5. Creating the energy burst
      10m 19s
    6. Using Trapcode Particular to add sparks to the phone reveal
      10m 53s
    7. Creating the phone screen video
      5m 27s
  6. 15m 37s
    1. Creating the type glows
      9m 36s
    2. Adding the type glint
      6m 1s
  7. 34m 33s
    1. Creating a camera shake effect using precomps
      8m 12s
    2. Adding depth of field with the Lens Blur effect
      8m 14s
    3. Transitioning to full-screen video
      8m 17s
    4. Using the ReelSmart Motion Blur effect
      4m 17s
    5. Putting together the final comp
      5m 33s
  8. 1m 25s
    1. Next Steps
      1m 25s

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