Representing action movement with blur

[Eric2575]

A long time ago I seem to remember a thread that talked about blurring an object in motion. The trick was to have the middle to back of the object blurred with a trail in it's wake, but the front of the object was not blurred. Imagine a car or plane or fist in motion with the leading edge in focus and blurring the image as it goes by. I hope I'm explaining this right? MUFOOF may have been used, but I don't recall. Does anyone remember how to do this? Here is a pic that shows what I mean: Front relatively in focus as the rear blurs out inot the blurry background.

[zandoriastudios]

Photoshop?

[robcat2075]

Composite a multipass frame with 100% motion blur with a non-motionblur frame. The non-blur frame must be the frame after the mo-blurred frame.

[robcat2075]

 

you could composite several blurs of different length to get a more diminishing effect on the tail.

[itsjustme]

Jeff Lee's Really Cheap Targa Motion Blur might prove useful.

 

Hope that helps.

[mtpeak2]

How about fake MB?

Fake_MB.mov

[itsjustme]

How about fake MB?

 

I'm going to guess...onion skinning? Looks great, Mark!

[Eric2575]

Well, that gives me quite a bit to play with, thanks guys.

[NancyGormezano]

How about fake MB?

 

GREAT!

[Gerry]

How about fake MB?

Wow, that's great! I've never seen a flower pot move like that! or spittoon...?

[mtpeak2]

How about fake MB?

 

I'm going to guess...onion skinning? Looks great, Mark!

No, it's not onion skinning. It's multiple instances of the same model, constrained to the main object with different lag settings and transparency set to the trailing instances. It's probably not practical for complex scenes, but it's very controllable with how many instances, how much lag between instances and the amount of transparency. With this setup, you can also pick and choose what objects get blurred. I haven't tested if this is any faster or slower than the regular MB, though. It was just a quick experiment to see if it would work.