[ishook]

The example shown below shows an X spinning. It creates a square, where it should really be making a disc.


It's most noticeable with a spinning cylinder, where the sides of the cylinder become clear and almost disappear, where in reality there would be no change except for a blurred surface.

Is there a fix in the works?

[ishook]

(BUMP)

Really, nobody else has a comment? NL? This is actually a big deal. Even Final Render gets it right.
I made an example of a cylinder. I'm doing action shots for a tool company and spinning parts are common.

[Polyxo]

I also got comparable results - which I think are wrong...

[Mihai]

How much is the object being rotated between each frame? Maxwell currently only handles 1 subframe for motionblur, it might look ok if you try with lower rotation values between frames.

[ishook]

How much is the object being rotated between each frame?

My example was a more extreme example, but the effect is the same no matter how much blur is evident. In this case it was like 60 rotations per frame (I think). Which is a lot, but -any- rotational blur is messed up, no matter the speed.

[Mihai]

It depends how much the object is rotating between each frame, before it starts looking obviously linear. If you want to make it look like a completely circular blur I'm afraid it's not going to work.

[Becco_UK]

Rotational (any non- linear) blur not rendering correctly has been known for quite some time. Maxwell is in need of more sub steps when using motion blur. Maybe a future update will resolve this?

In the meantime, for static images, I use a lower amount of rotation for motion blur with some postwork to 'round' out the blur.

Although a niggly fault it's still nice to have blurred shadows and motion blur showing in reflections - can Final Render do that?

[ishook]

Not sure if final render can do that, I dropped it years ago. (go maxwell!)