Trying to find a long motion blur FX

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Mixolydian

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Trying to find a long motion blur FX

PostThu May 16, 2024 2:39 am

I've been trying for a few months to find some FX that will give me something as close as possible as the long motion blur we see in this movie, 2009 Star Trek:

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NCC1701_00006410.jpg (159.54 KiB) Viewed 1007 times


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NCC1701_00006411.jpg (125.64 KiB) Viewed 1007 times


In Resolve, the Motion Blur FX would work if it gave a longer blurred path, but even on the longest, it doesn't do much. Plus it's kind of buggy in Resolve 19 Beta 2 because sometimes it doesn't even work. But I'm not going to complain about something not working in a beta software since it was my choice to install it.

But is there any motion blur FX that will maybe create a blur between more than 3 frames, but maybe 10 frames and produced this kind of effect? That can be anything in either Resolve Studio or Fusion Studio.
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Uli Plank

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Re: Trying to find a long motion blur FX

PostThu May 16, 2024 9:47 am

There’s an effect in the BorisFX Sapphire collection integrating as many frames as you like.
Got to check the name when I’m at my other machine. Please note that it works best if you record 360 degrees instead of 180.
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Andy Mees

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Re: Trying to find a long motion blur FX

PostThu May 16, 2024 10:46 am

Have a play with the built in 'Motion Trails' OFX ... note that the Trail Length setting has a default max of 10 frames but can be manually set as high as you need/want.
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KrunoSmithy

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Re: Trying to find a long motion blur FX

PostThu May 16, 2024 11:51 am

Are you talking about anamorphic lens flare? That is not a motion blur, its by product of of a lens shape, but if you want to simulate lens flares there are various options out there, just need to track the things you want to attack a lens flare and choose an anamorphic one.

Edit: I just noticed that you might mean the light speed effect or warp speed effect when spaceship elongates to the distance. A stretchy effect. I've not done it myself, but there are some tools in fusion like trails that could be used or in Color page, maybe Directional Blur combine with something else, I would have to experiment. Depending on what you want, you might want only portion of the screen, like spaceship to stretch, meaning you need to have it as a new composite layer. That is how they have done it in Star Trek, I imagine.
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Uli Plank

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Re: Trying to find a long motion blur FX

PostThu May 16, 2024 2:40 pm

The one I referred is S_TimeAverage.
Please note that not all cameras can shoot 360 degrees shutter or very close to it. Some may produce interrupted lines instead.
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Mixolydian

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Re: Trying to find a long motion blur FX

PostFri May 17, 2024 7:22 am

Uli Plank wrote:There’s an effect in the BorisFX Sapphire collection integrating as many frames as you like.
Got to check the name when I’m at my other machine. Please note that it works best if you record 360 degrees instead of 180.


Well, I'm not planning on getting any subscription to Maxon One or whowever owns BorisFX these days. I was asking about anything that is included in either Resolve Studio or Fusion Studio.

And I didn't clarify this because I thought it was obvious from the stills of the movie, but this is not live camera footage, it's an EXR sequence from Blender, so the shutter speed is between 0 and 1, as in 1 frame.
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Mixolydian

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Re: Trying to find a long motion blur FX

PostFri May 17, 2024 7:25 am

Andy Mees wrote:Have a play with the built in 'Motion Trails' OFX ... note that the Trail Length setting has a default max of 10 frames but can be manually set as high as you need/want.


I did actually play with that a lot before posting here, both in Resolve and then in Fusion Studio (I can't remember if it's exactly the same plugin). But basically what I got from that were some very trippy effects, but I didn't find a way to connect the instances. You could do a lot of them, but they were instances. And there is a blur, but it is only spatial, not from one frame to the next.

Did I miss something? I'll check again tomorrow.
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Dave Shortman

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Re: Trying to find a long motion blur FX

PostFri May 17, 2024 7:33 am

Mixolydian wrote:
Andy Mees wrote:Have a play with the built in 'Motion Trails' OFX ... note that the Trail Length setting has a default max of 10 frames but can be manually set as high as you need/want.


I did actually play with that a lot before posting here, both in Resolve and then in Fusion Studio (I can't remember if it's exactly the same plugin). But basically what I got from that were some very trippy effects, but I didn't find a way to connect the instances. You could do a lot of them, but they were instances. And there is a blur, but it is only spatial, not from one frame to the next.

Did I miss something? I'll check again tomorrow.


Have you looked at the frame average node in fusion, that may merge things in the way you are looking for?
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KrunoSmithy

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Re: Trying to find a long motion blur FX

PostFri May 17, 2024 9:49 am

I tried to replicate the warp speed effect, and failed, but in the process I ended up making a warp speed kind of effect, but in reverse. I animated the environment instead of the ship. Directional blur on zoom for motion blur, some shake modifies and few tweaks, and rays tool was used to sort of give a trail effect. Like I said, I failed. But its a good learning experience and I kind of like the effect I got, even if its not proper way to do it. But happy accidents and all that.

Anyway, this is what I ended up with.

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Hendrik Proosa

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Re: Trying to find a long motion blur FX

PostFri May 17, 2024 10:55 am

Elongated blur in post is a bit tricky. What I would try: first simulate 360 degree shutter (full frame) using motion blur effect, then apply frame averaging to extend the blur over a set of frames. Trying to do long streaks from single frame without frame blending will most probably visually fail as it won’t capture the curvature of motion.

In Star Trek those streaks were most probably rendered in 3D directly, not done in comp.
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