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Motion Blur

Posted by Marius Oberholster on Tuesday, January 5, 2016 Under: Learning
Hey all!

I feel lead to talk to you guys about Motion Blur. Most of you know what it is, so I don't have to go into that, but in Blender there are a few ways of doing this, so I want to tell you what I do, why I do it and what I believe GOD has shown me is the best for, at least, 2D Work that you want to add motion blur to.

In Blender, you know we have three options for rendering and they all have motion blur options:
> Blender Render
   - Sampled Motion blur (takes forever, so not even remotely an option, though most accurate, because even the shadows will moves as they should)
   - Vector Blur (fastest and most flexible and practical)
   - VSE Frame onion skinning
> Cycles Render
   - Something equal to sampled motion blur in Blender render, under the render settings, just faster.
   - Vector Blur (again, fastest, most flexible and practical)
   - VSE Frame onion skinning

> OpenGL Render
   - Vector Blur (post processing, rendering only the depth and vector passes)
   - VSE Frame onion skinning
   - BGE screen recording (need a 3rd party recording application) using the motion blur 2D Filter

Now for the sake of this post, I'm going to assume you have chosen your method and you are already happy with it and I am simply going to make a suggestion that you are welcome to take or leave.

I use Vector Blur, not just because it's the fastest, but that's what I believe GOD wants me to use and it has the most control over the amount of blur (unlike onion skinning). And as most of you know, I am currently focused on toon shading and the anime style and getting the elements right for it to look right and that's where motion blur comes in.

I don't know if you know it or not, but most anime shows have implemented motion blur in some way shape or form, especially the newer shows that contain a lot of CG. The reason they add motion blur, is not because they want messy lines, but because they literally treat the drawings like camera footage. It's treated with the same care, if not more, as any footage you would get out in the field. We're talking even lens flares and glows.

Recently, as most of you know, I started work on another short video from the Bible, called Esther 6 (because it is literally Esther, chapter 6), and for that, I needed to know what the right output needed to be for the animation. Through quite a bit of research, I found that anime is done in a very specific way:
 > Most of the animation is done in 2's or 3's. That means a frame every 2 frames or a frame every 3 frames. In other words, if you have a show running at 24fps (standard for anime), you will have either a true frame rate of 12fps or just over 7fps and only special shots getting the full 24fps treatment.
 > Output frame rate is 24fps (same as film)
(just one of many sources is the Anime Studio Forums)

The newer animes are depending on a mix of traditional and digital animation. Mostly traditional for the characters, as the 3D programs sometimes really struggle to get the shape consistent with the style and it can require lots of render time. When talking about the shape, I think of Blender struggling to get the cheek light spot correct. It's just not there yet.

However! Motion blur is becoming a bigger and bigger part of the animation process - even for 2D. After looking at a lot of art work and some animations, I've noticed that the motion blur is not overwhelming and it is also not almost missable in some cases, because it's only in a few sections of the scene, like a burst of smoke, spinning tire, quick arm movements, etc. Sometimes it's simply a case of drawing it, other times it's been blurred in post, using things like ReelMotion or manual blurring.

For anime in Blender, specifically, I use a Vector blur speed of 0.5 on 32 samples - High Quality compositing.
The reasons for this are:
- The blur is minimal (and not distracting),
- The blur shows up in fast movements prominently enough, yet renders fast
- You retain a sense of clarity, while still enjoying the benefits of motion blur (such as actually being able to see something better as it moves - somehow makes it easier for your eyes to follow)
- It works beautifully with 24 fps

I totally encourage you to try the above settings and see what results you get (yes, with freestyle) and see if it fits your project. GOD lead me to these settings and with quite a bit of testing with different motion speeds and animations. HE wants you to know this too, so now you do, hahaha.

Have a great one and GOD bless!! :D

In : Learning 

Tags: god  jesus  holy spirit  blender  motion blur  anime  leading and testing results 

"For I testify unto every man that heareth the words of the prophecy of this book, If any man shall add unto these things, God shall add unto him the plagues that are written in this book:
And if any man shall take away from the words of the book of this prophecy, God shall take away his part out of the book of life, and out of the holy city, and from the things which are written in this book.
He which testifieth these things saith, Surely I come quickly. Amen. Even so, come, Lord Jesus.
The grace of our Lord Jesus Christ be with you all. Amen." Revelation 22:18-21

"Add thou not unto his words, lest he reprove thee, and thou be found a liar." Proverbs 30:6

King James Version, Public Domain

About Me

Marius Oberholster Hey! I've been doing this full-time since July of 2011. It has been an incredible learning experience, not only learning how Blender works (still learning), but also about Open-Source and the incredible software available. ----------- This Blog will be a way to stay up to date on all things Panther Dynamics as well as some personal stuff as well.

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