Unreal engine Motion blur

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VISDE
Posts: 2
Joined: Wed Jul 13, 2022 4:13 am

Unreal engine Motion blur

Post by VISDE » Tue Jul 19, 2022 9:38 am

I'm having a problem with motion blur in the unreal engine. I have to unlock the display rate at runtime to have proper motion blur in the movie render queue, but if I do. The path that was imported from 3ds Max is not smoothed. Wheels will start jiggling. I tried to bake the animation and import as a fbx, and still not working. If I try to smooth the curve manually, I ll lose some details. Please help...

here is some photo of the issue
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Screenshot 2022-07-19 003349.png

Patrik Martin
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Location: Gothenburg, Sweden
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Re: Use animated car in Unreal Engine 4

Post by Patrik Martin » Thu Jul 21, 2022 11:16 pm

VISDE wrote:
Tue Jul 19, 2022 9:46 am
I'm having a problem with motion blur in the unreal engine. I have to unlock the display rate at runtime to have proper motion blur in the movie render queue, but if I do. The path that was imported from 3ds Max is not smoothed. Wheels will start jiggling. I tried to bake the animation and import as a fbx, and still not working. If I try to smooth the curve manually, I ll lose some details. Please help...

here is some photo of the issue
Most likely there is an interpretation between the keyframes that is the issue. So if you render a frame on the keyframe it is correct but if you render between two keyframes you have this strange issue with wobbling wheels.

The best is to make sure to animate in the same FPS as intended to be rendered out in Unreal.

So if you intend to render in 30 frames per second you need to animate in 30 frames per second.
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VISDE
Posts: 2
Joined: Wed Jul 13, 2022 4:13 am

Re: Unreal engine Motion blur

Post by VISDE » Fri Jul 22, 2022 10:23 am

I went back to 3ds max and double check make sure when I exported the same frame rate I use in unreal (24 fps) and the same problem still occurred…

I have no problem render with lock display rate at runtime but if I do there will be no proper motion blur

Patrik Martin
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Posts: 375
Joined: Mon Feb 25, 2008 1:07 pm
Location: Gothenburg, Sweden
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Re: Unreal engine Motion blur

Post by Patrik Martin » Fri Jul 22, 2022 10:35 pm

VISDE wrote:
Fri Jul 22, 2022 10:23 am
I went back to 3ds max and double check make sure when I exported the same frame rate I use in unreal (24 fps) and the same problem still occurred…

I have no problem render with lock display rate at runtime but if I do there will be no proper motion blur
Another issue that can arise is if the transforms are non uniform. Does the export log stat issue with uniform meshes?
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