motion blur

[blastered_cg]

Hi all Vray for Rhino users,

i need your knowledge about motion blur effect in VfR.

i ve allready surfed in forum for that yet there are some thing that confuses me, and i hope this thread will put an end to this confliction.

first of all VfR at beginning has some problems with Bongo about how to obtain properties of the frames these are after or before of rendered frame. Then with service release this has fixed (am i right?). so do we need Bongo or is it possible to do Motion Blur with Rhino build in animation tools?

secondly, there is nothing about motion Blur in VfR manual except physical camera>shutter speed and ISO. anyway i ve test it a little but couldnt figured out what is going on (i think a parameter is not good because everything becomes extremely blury i mean EXTREMELY nothing can be seen no details even no high lights nor any shadows that makes you think "there is smth".) i need some help about these parameters and what they are doing.

and lastly, is it necessary, to use physical camera, to make an animation, to render all the frames of that animation?

it will help, me and whom that has problems with motion blur, to figure out what to do if you could at least write your experiences in even single one of these questions.

Thank you all.

[dalomar_cg]

Re: motion blur

Motion blur is non existent within VFR at the moment. Basically, bongo is rather dump when it comes to outputting rendering info...in terms of rendering, each frame only knows where it is for that specific moment. In order to render motion blur, you will need the velocity information of a given frame...basically the information of where that frame has been, and where its going. Since we don't have this information, we can't have motion blur.

We've talked about a few solutions, but all of them have seemed rather intensive. We are hoping that bongo 2 will have better rendering support, so that information can be retrieved much easier.

I'm not sure about if there were any issues with bongo fixed in the upcoming service release. We get very little response/request for bongo functionality at the moment, so we've been spending our time working on things that will be of value to more of our user base. Part of the reason why I think we've gotten so little response is because bongo is not a very widely use plugin within Rhino, and that its actual performance in terms of other animation packages is limited (hence the people who would do animations are using a more robust package).

Lastly, you can use whatever camera you want for animations...standard of physical

[blastered_cg]

Re: motion blur

Thank you for your explanation Dalomar and thanks for working hard. i was waiting some info about that till morning now i need to think of something else. hope Bongo 2 makes it.

[Micha_cg]

Re: motion blur

Damien, will we see motion blur for still images in the near future? I have seen, Maxwell support something like this, maybe the workflow is an inspiration for the developing team.

[matteusr]

Re: motion blur

Motion blur in PS aaall the way :P

[dalomar_cg]

Re: motion blur

Damien, will we see motion blur for still images in the near future?

I'm not sure what you mean by moblur for still images....everything is a still image when you boil it down. You could have motion blur in a single image in Vray, but you would still have to animate something so that there is movement.

As I hinted before, Bongo needs some work. Any one who has used it knows how tempermental it can be, and it was developed in a completely different "Rhino world" then what we're currently in. Rhino 3 was very limited in what Bongo could really do, and when it was developed, there weren't really any 3rd party renderers in the picture. From what I've heard of Bongo 2 (which goes back to Nov '06 in London) is that its going to take full advantage of the new possibilities of Rhino 4, in terms of animating things like control points and the like (IK too if I remember correctly). Now that 3rd party renderers are in the picture, my hope is that bongo 2 can provide a much better means of renderers connecting to animation information without jumping through a lot of hoops. Andy [Le Bihan] is in charge of bongo, and he's had is hands full with RDK and Brazil. Hopefully, once those projects get to a good solid point, Bongo 2 can get the attention it deserves.

[Micha_cg]

Re: motion blur

Since nobody is official talking about Bongo 2 (I suppose so we will not see it this year) and motion blur is interesting without Bongo too, it could be nice to get a solution for single frame renderings like Maxwell support it: the user "reset initial position" of an object and move it to a new place. Now, a motion blur effect between both positions is rendered - simple and nice effect.

[Micha_cg]

Re: motion blur

Here a nice video how motion blur works at still images without Bongo:

http://www.maxwellrender.com/plugins...4R4_MBLUR.html

[merlik585]

Re: motion blur

Cool !

There is also a discussion about this on the Bongo NG,

Renee

[Markvanhandel]

Re: motion blur

Just putting out my request that if and when Bongo fixes its info output you take the time to make the motion blur cooperate with that product. I have been using Bongo with VRay and you can get some pretty jittery results when you are close to objects that don't blur.

I am heading over to the Bongo site now to pressure them as well.

Thanks!

[dalomar_cg]

Re: motion blur

Either way, its still in our court. There should be enough within bongo and rhino for us to do what we need to, its just a matter of us getting down an getting our hands dirty.

In terms of jittery animation, motion blur isn't going to really affect that because its not an issue of blurring or not blurring. What you're seeing is most likely an irradiance map artifact. If you don't have any moving geometry than the solution is relatively straight forward (in fact we have an animation tutorial), but if you've got moving geometry your going to have to be willing to throw a change up or two. What kind of scene/animation are you working with?

And btw, motion blur is a notorious killer of render times, so using it with animations is something that is very time consuming unless you've got a render farm.