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Kaprolactam

Modulating Motion Blur

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Hello, you helpful people,

I'm currently doing snow VFX and I'm a bit bothered by the tube-like look of the mantra motion blur. I'm also using VRay quite a bit which has some helpful features to make the motion blur look less sterile, especially two settings, as shown below.

vray_motion_blur.jpg.9d6082036a6ac51b025731dd193a394a.jpg

The first setting allows me to move more samples towards the centre of the time interval, simulating a shutter that's not instantly opening and closing. The second setting allows me to move more samples towards the front or the back of the interval. Using the two settings combined, I've quite a lot of control over the look of the motion blur.

Is there anything comparable in Houdini or are there some tricks to emulate that look? I think I've diligently read what I could find about motion blur and mantra but I couldn't find anything comparable.

Thanks in advance!

Paul

 

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Theres a parameter you can add on the Mantra ROP thats called something like ”shutter shape”. That gives you a ramp where you can say when the shutter is open or closed. 

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That's exactly what I was looking for! I didn't know, that there actually are render settings hidden in the parameter interface that don't show up by default.

Thanks a lot!

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