Quick Animation multiFrame Motion Blur test

[TBFX]

Hi all,

Unfortunately all the work I have done in Octane over the last couple of years cannot be posted publically yet but here is a quick test I did using Octane for Maya to test out Multiframe reduced sampling Motion Blur and displacement converted to polygons with history (the water surface).

3x GTX 580's | Path traced | Max samples 1000 for a still frame, 10 mins per frame | Max samples 100 per subframe for multi frame Motion Blur (averaged 10 subframes for each final frame), 1 min per frame | However due to no built in system within Maya to do multiframe blur I had to render 20 subframes per frame and ditch half of them to get 50% blur so final render time per frame was 20mins.

I'm not a creature/character animator in any sense of the word so the animation on the fly is pretty basic and not all that good but it was not the point of the test, I just needed a subject on the log to make it interesting.

[vimeo]http://www.vimeo.com/75679271[/vimeo]
https://vimeo.com/75679271

T.

[Zay]

Just....awesome

[TBFX]

Cheers Zay.

T.

[p3taoctane]

Nice dof and texture on the log mate. Nice grass too... OK it is all good :>)

[TBFX]

Nice dof and texture on the log mate. Nice grass too... OK it is all good :>)

Thanks mate.

T.

[3rdeye]

very impressive !!

[Refracty]

Very impressive.
How is the workflow of blending the subframes.
Do you use Nuke or a frameblending effect in after effects?

[TBFX]

very impressive !!

Thanks!

How is the workflow of blending the subframes.
Do you use Nuke or a frameblending effect in after effects?

I'd love to use Nuke but I can't justify the cost of Nuke for home so I use Autodesk Composite (formally Toxik) which Autodesk now give away with licenses of Maya.
So I throw a scene timewarp on my animation scene that scales everything to 20 times longer and then render at 1/10 the max samples as I would have for a clean still.
In Composite I apply a Retimer node set to speed the footage up 20 times using the frame blend method and set the number of frames to blend either side of the current frame to 4 or 5 (4 gives a blend of 9 frames and 5 gives 11) giving me blur for around 50% of the motion between frames. It's a bit of a pain having to render extra frames that just get discarded but without coding something or rendering loads of 10 frame batches and doing the averaging in some other batch process this is currently the easiest way.

There is some noise introduced into the blurred areas as you would expect as they are effectively being sampled through time at a lower additive maximum (if that makes sense) but so far I've done a few shots this way and have not needed higher sampling than a straight (still frame Max samples/number of frames to be averaged) to get a visually pleasing result.

T.

[resmas]

Thats amazing mate, and with all that tech info you just gave...i think i burn a fuse..

well done

cheers
resmas

[Refracty]

Thanks for the great tips.
I am using After Effects and it sounds that with time stretching the same effect can be set up there easyly as well.