Best workflow for smooth animation?

[re:FORM]

Just a quick query to see what you all do out there.

This is for an architectural external animation featuring moving vehicles....

I've seen someone render at 50fps without any motionblur, then add the mo-blur in post and resample to 25fps (pal). They were using cinema4d so may have had to do this to avoid any problems c4d has at producing motionblur at any sort of decent speed.

Is this a process worth doing with vray?

[panthon]

If you render at 50fps and resample to 25fps, you will get slow motion, and slow motion does not have much motion blur...
What to do want to achieve exactly? What do u mean by smooth?
I would definitely add motion blur in post, and i would use rpf for that, if moving vehicles are fast, u will only see a blurred thing going by.

[studioDIM]

second panthon on this one!


Lele

[panthon]

Hey Lele, u are getting close to me in number of posts!
I must hurry!

[studioDIM]

rushrushrush!

293!

[re:FORM]

you guys and your post-geekerage

sorry, I didn't mean halfing the running time.... I meant interlacing the 50fps footage...so effectively loosing 50% of your image per frame.

actually, after speaking with them again, the sequences that they rendered with motionblur were rendered at 20x frame rate, then time-stretched down to the correct speed, and blurred using the frame blender in after effects.

so I guess there's two techniques going on here.... rendering at 50fps progressive scan to then produce the interlaced footage at 25fps for broadcast.... and the rendering of sequences at much higher frame rates that are then timestretched back down and blur added using AE built in frameblender.

hope that makes more sense
(if not, atleast it gives you an excuse to get more posts)

[studioDIM]

it does make perfect sense, i also used it once. (edit: AND i posted! :P)
It's a workaround to have deformation blur aplied, it's not necessary for archviz, for which the rpf moblur is generally more than enough (unless someone's planning 3d moblurred swaying trees, ough!).

Basically, when you render more frames (streching the lenght of your animation proportionally) and blend them back in AE (or similar) you get precisely what the 3d moblur does, with a number of subsamples equal to the multiplier (new lenght/original lenght) and a bias of 0.5 (centered).
In this way one makes sure the subtleties of a character motion are well preserved (as one would do increasing subframe sampling in a 3d moblur...).

It's a bit like "zooming in" the timeline, to then zoom back out and reconstruct.

May help if the scene is very loaded with geometry, and there's not enough ram to fit it moblurred.
Otherwise i think vray's gonna be faster (being adaptive).

Lele

[panthon]

If you only want motion blur, render it to 25 frames progressive, as usual, but outputting it in rpf, checking the coverage and the velocity gbuffer. Then u can use combustion -maybe after effects too- to blur the image accordingly using a 3d operator called RPF motion blur. It's more accurate than frame blending -in fact frame blending is crap-.

The other solution would be using a plugin for AE and combustion called Reelsmart Motion Blur, which - intelligently, or sort of- will motion blur your sequence.

[studioDIM]

but outputting it in rpf, checking the coverage and the velocity gbuffer.

rendernodeId and ZBuffer are also very welcome.
Refer to the combustion html manual for what channels are needed for which effect (some are necessary, others suggested and desireable).

Pant, pant!

Lele

[re:FORM]

If you only want motion blur, render it to 25 frames progressive, as usual, but outputting it in rpf, checking the coverage and the velocity gbuffer. Then u can use combustion -maybe after effects too- to blur the image accordingly using a 3d operator called RPF motion blur. It's more accurate than frame blending -in fact frame blending is crap-.

The other solution would be using a plugin for AE and combustion called Reelsmart Motion Blur, which - intelligently, or sort of- will motion blur your sequence.

I read that frameblending in AE has been improved with the addition of the Timewarp effect, which offers improved velocity channel based motionblur.

Has anyone else used this in preference to using vray's built in motionblur?

[panthon]

If you only want motion blur, render it to 25 frames progressive, as usual, but outputting it in rpf, checking the coverage and the velocity gbuffer. Then u can use combustion -maybe after effects too- to blur the image accordingly using a 3d operator called RPF motion blur. It's more accurate than frame blending -in fact frame blending is crap-.

The other solution would be using a plugin for AE and combustion called Reelsmart Motion Blur, which - intelligently, or sort of- will motion blur your sequence.

I read that frameblending in AE has been improved with the addition of the Timewarp effect, which offers improved velocity channel based motionblur.

Has anyone else used this in preference to using vray's built in motionblur?

That would be very welcome, because as far as i know, u dont have RPF motion blur as a filter or operator in AE 7...

[Da_elf]

what is your final output? cant you just render with vray motion blur at 24fps if its for DVD? that way its 24p

[panthon]

what is your final output? cant you just render with vray motion blur at 24fps if its for DVD? that way its 24p

Vray motion blur is slow.

[re:FORM]

what is your final output? cant you just render with vray motion blur at 24fps if its for DVD? that way its 24p

I could, but I was just wondering if there was a quicker way to do motionblur without resorting to vray motionblur which seems to be overkill for arch-vis work.

[studioDIM]

what is your final output? cant you just render with vray motion blur at 24fps if its for DVD? that way its 24p

I could, but I was just wondering if there was a quicker way to do motionblur without resorting to vray motionblur which seems to be overkill for arch-vis work.

come on! get that combustion demo and render those RPFs!

check this thread out to see some results.
http://www.chaosgroup.com/forum/phpB...=127397#127397

Lele