I am wondering, how exactly does motion blur work in krakatoa? I was assuming it traces back each frame, but in these two pics you can see, they are identical, althought they are using 32 and 128 segments…
I was also trying motion blur on another scene, and there it didnt seem to work at all, i did look close at the process, there was a slight shift but it did not shift back all the frames i wanted it to, how can i force this? or what is going wrong?
thanks for the help
That number refers to the number of samples over the motion blur range. You won’t see much difference between 32 and 128 in your example.
hahaha, that is great to know!
but please tell me where can i change the range?
ok i got it!
i always thought the motion blur shutter was for the jittered motion blur because its right next to it, and that the degrees meant how much it jitters 
its the length of the shutter (time) so now i got it! why not just have frames as an input?
Because most of the time we think of frames as being images, not time steps. It’s not a hard conversion to make in one direction, but can be tricky in the other (multiplying is often easier to do mentally than division).
en.wikipedia.org/wiki/Shutter_angle
If it it of any help, RenderMan uses Shutter Angle.
Just because Max is ass-backwards (it suggests 1.0 frame where 0.5 is the standard in cinematography), it does not mean we have to stick to it. 
thx for the info!
im a photographer but never heard of rotary disc shutter, good to know!
hey, wouldnt it be great if you can set a falloff for the mblur? so that the first image is sharpest and the previous motion frames have a smooth fade out???
would be a terrific effect
But at that point you might as well be accumulating them after the render, as a composite.
doing that in the comp?
i think it would be fairly easy to integrate a falloff for the motion blur frames, wouldnt it?
you can see the frames being redrawn at render time, this algorithm would just lessen the opacity for each added sample,
would be very nice !!
But the motion blur doesn’t account for changes in lighting. If it did, you’d be all set. As it doesn’t, the effect would be unrealistic, and as such probably best reserved for a composite where you can fine tune the unrealism.
hey kraka isnt just for photorealistic renders 
anything that looks good should be taken into consideration ^_°
really would have no idea how i would create a 10frame falloff motion blur in nuke or AE 
Along those lines, what if you wanted to have the color change over the length of the blur, not just the opacity? At some point you just need Krakatoa to supply the method to do something, not have it do the thing automatically.
great idea!
opacity falloff and color changing particles during mblur –
im not asking krakatoa to do anything automatically,
changing the falloff curve is a very specific thing which allows for the artists unique interpretation, its just another tool to be used,
but i see im at a dead end here
and to do it in post, i for one wouldnt know how to do this effect, and then we could go on and argument that we can change everything
in post, dont change color for particle as they age in max, do that in the comp that would be a bit silly probably, or?
this falloff opacity curve for motion blur is a wishful thought i had while looking at my mblured renders, as i dont think it would take much programming to achieve the integration,
it would just introduce a nice fade out effect instead of a “constant” look
it also wouldnt require to rerender scene, if the look can be achieve in one pass
this one i like the best! just an overly with both images but it would be even nice to change the motion blur to fall off, and also the phase of it, (u can chang this in cebas final mblur as well)
also the need to render sepearte passes would be eliminated if the optimal look can be achieve in one…
here are 2 scanline renders, u can see what falloff effect could look like (ignore the fact that its radius gets smaller)
here we can get an idea of what motion blur falloff effect would produce…
and i think this can be used for anything, not just abstract art stuff,
even fire particles, the mblur of the sparks will not be constant, but fade out, ANYTHING
sorry , i just have a lot of dreams and wishes 
i love motion blur and i LOVE kRakatOA!!! , the more control i have over how it looks, the better!
