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Setting up motion blur in Mental Ray is a little bit different than setting up in the Maya Software Renderer. There is some different parameters, but a lot of the theory is the same. So I've got our little guy on the scooter. Let's go ahead and just find a frame that is good for motion blur. So, actually probably a good frame is this one to ones towards the end here, where he is kind of zooming offscreen. So I'm going to pick Frame 89. Let's go ahead and set up some motion blur. But before I do, well, let's just do a quick render of the scene just to see what it looks like.
Okay, so this is without any motion blur. So go ahead and just remember that. Let's go ahead and start setting up to motion blur. So in mental ray, the motion blur settings are a little bit different. So we can find them under the Quality tab. If we scroll down here, you'll see we have Motion Blur right here. We have three settings. One is Off, the other one is No Deformation, and the other one is Full. Now with No Deformation, what it does is it basically doesn't calculate motion blur based on deformation.
So if I have some sort of skeletal animation or something like that, then that will not be calculated in the motion blur. But I am going to go ahead and turn this on and let's just go ahead and do a quick motion blur of this scene with the setting at No Deformation. So when we've rendered this with No Deformation, you can very easily see what the problem is, is that if anything is using a skeletal or any sort of deformation that will not be calculated in the motion blur solution.
The reason that mental ray does this is because it's faster when you don't calculate deformations. But in our situation, the arms of this character are being deformed, and so what we're getting here is we're getting just an incorrect result. So, let's go ahead and turn on Full Deformation. Also, let's go ahead and take a look at some of these parameters. The first parameter is Motion Blur By. This parameter basically just multiplies or reduces the amount of motion blur. Larger numbers, bigger motion blur, smaller numbers less.
The other two are Shutter Open and Shutter Closed. Basically, what they do is they simulate the camera. So, the closer they are together, the less motion blur you're going to get. So now with Motion Blur on Full, let's go ahead and do a quick render. So as you can see, with Motion Blur on Full, the arms are actually rendering properly. If we want, we can increase or decrease the motion blur by using this Motion Blur By parameter.
But these are the basics of mental ray motion blur. It's actually a little bit simpler to set up than the Maya Software Renderer motion blur, because it's always a real -time physically based motion blur as opposed to Maya, which can have 2D or 3D.
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