Corona Motion Vectors and Corona 3D Motion Blur

[redlad]

Hi,

Can anybody tell me is there a workaround for getting a motion vector pass out of Corona? Even through a CTexmap element maybe?

I'm working on a production and at the moment we're testing rendering motion vector pass from Mental Ray, which is not perfect I know.

The main problem is - I have a set that uses Corona Scatter to create grass and it does a fantastic job by the way. But, for motion blur, this cannot be rendered out in the velocity pass using Mental Ray.

Our comp artists want the pass to do nicer motion blur in Nuke. True, proper full 3D Corona motion blur is a dream but would more than likely be to expensive to render. Do many people here use the full 3D motion blur our of curiosity??

[Ludvik Koutny]

This is not mental ray. Enabling true 3d motion blur will have almost no impact on performance, only slight impact on memory. Of course if your scene is MB heavy, then you've got to focus more rays into AA sampling, therefore decrease GI/AA parameter a little, depending on how much MB heavy your scene is.

The main reason so important thing as motion vector pass has so low priority in Corona and hasn't been implemented yet is that MB in Corona is really fast :)

[rfletchr]

that's kind of ignoring the reality of TV production, sure its faster than MR but it still has a render overhead, and it also burns motion-blur into the frame. When your working with a director its not uncommon to be asked to increase or decrease the motion blur

Its simply not fast enough to remove the need for comp.

[Ludvik Koutny]

that's kind of ignoring the reality of TV production, sure its faster than MR but it still has a render overhead, and it also burns motion-blur into the frame. When your working with a director its not uncommon to be asked to increase or decrease the motion blur

Its simply not fast enough to remove the need for comp.

Yes, I wasn't implying motion vector pass is not important. It is, and for many more reason than only postprocess MB. I was just saying that MB in Corona adds perhaps 10-15% to rendertime, instead slowing it down several times like it is case with MR.

Also there is a reason Corona 1.0 release is focused on ArchViz and not TV production. Future releases will be focused more on VFX/TV, but we can't have everything at once. Reality of TV production is that you would not pick Corona to do the job in the first place, if you knew it does not have all the features you critically need to get your job done.

[rfletchr]

are you in some way associated with Corona?

[Ludvik Koutny]

are you in some way associated with Corona?

Nope... I currently work in something you could call a "TV Production".

[redlad]

Hi,

Can anyone tell me has this feature been added into Corona 1.1 by any chance?

Thanks

[Alan]

Nope, this is the features/fixes into 1.1:
https://corona-renderer.com/blog/corona-1-1-released/

[redlad]

Thanks Alan,

It would be cool if this feature was implemented Ondra ;)