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Proper motion blur on car/road

Posted: Sat May 14, 2022 10:19 am
by mikeadamwood
I'm working on a project where I need to show a car and getting the motion blur to work correctly is a real pain.

I am adding the camera to the driving car and I want the motion blur on the wheels spinning but I want the car not to blured, but the background bluring.

The best settings I got are:
Object tag on car body - disable motion blur
Object tag on spinning wheels - transform motion blur
Object tag on passing scene/road - transform

But I have to disable motion blur on the camera otherwise the entire scene blurs including the car.
PureRef_tN2JyWGCvH.png
However, the passing scene/road does not get the motion blur.

Unfortunately can't share my scene as it's for a client.

Can anybody just let me know or even share a scene file that gets results like this? I mean it's obviously possible as the image below is old version of octane. Honestly, I've found every other thread regarding this here and there seems to be no proper up-to-date info.

Are there any example scene files
chrome_nXzYv7QSpK.jpg

Re: Proper motion blur on car/road

Posted: Sat May 14, 2022 1:01 pm
by elsksa
Hi, coming as a non-Octane Cinema 4D user.

I'd suggest to ensure
• The Motion Blur [ ] checkbox is checked.
• The Object Tag is applied at the upper hierarchy of the car asset in the Cinema 4D outliner (if I am not mistaken).
• Double-check the Cinema 4D settings > Octane Renderer > Main > Motion blur section.
• The camera and car animation is physically (more or less) reproducing the reality.

Re: Proper motion blur on car/road

Posted: Sat May 14, 2022 4:32 pm
by aoktar
This is FAQ topic and having many answers in forum. Nothing so difficult if you understand the logic. Camera should have the zero motion relatively to CAR. Like linking it to CAR. See example scene.

Re: Proper motion blur on car/road

Posted: Wed May 18, 2022 9:49 pm
by mikeadamwood
That scene file helped, thanks.