Vray Motion Blur problem, HELP

[pomidorov333]

Hi, i’m trying to render an animation using Vray 1.5 SP2 on Max 2009. The problem is with motion blur, I have the Vray Physical camera set up observing the moving object. I rendered the clip without Motion Blur successfully, but when I enable motion blur under the *sampling roll out of the physical camera, the rendered image shows up completely black (not even alpha just empty image colored black) , or sometimes I get an error “unhand led exception: camera sampling”.

I tried trouble shooting the problem by setting up a completely new scene, adding lights, turning off the Motion Blur in the render settings in Vray trying different cameras, raising and lowering the f-number and the film speed, unchecking the motion blur box in the object properties ----> it made no difference. I googled the problem : turns out there are some threads on forums talking about the problem but no solution is given.

can anyone help? I’m really close to finishing the project and I would love to have the vray materials in my scene with motion blurred animation. if no one had this problem can you offer some knowledge as to how to add motion blur in post???

[alias_marks]

if no one had this problem can you offer some knowledge as to how to add motion blur in post???

 

I'm currently trying to do the same thing, did you ever find out how to do motion blur in post?

[alias_marks]

I think I may have found the workflow here if anyones interested - http://www.chaosgroup.com/forums/vbulletin/showthread.php?t=46870&highlight=real+motion+blur

 

I'm going to give it a shot.

[RAYfighter]

I think I may have found the workflow here if anyones interested - http://www.chaosgroup.com/forums/vbulletin/showthread.php?t=46870&highlight=real+motion+blur

 

I'm going to give it a shot.

 

Please give it a shot and reply here with the solution, since many seem to be interested...

I am having the same problem - black framebuffer.

 

EDIT: the black image is an output only when using Physical Camera. With standard camera Mblur works just fine.

Edited July 23, 2010 by RAYfighter

[alias_marks]

Hey Rastislav, I would love to share if it worked or not but I actually ended up just hand keying my motion blurs with directional blurs in after effects.

 

Turned out that it was more complex to use the vector technique with moving cameras + moving objects at the same time. The time it was going to take to render out the necessary passes was kind of moot when I could get close enough in a fraction of the time by just hand keying directional blur in post..

Edited July 23, 2010 by alias_marks
clarification

[c.klaassen]

not sure if anyone still having problems with this, but with Physical Cams make sure you have motion blur ticked on the camera as well as the main setting.

 

works for me!