Physical Camera motion blur settings

[shadevfx]

Hi there, we're having a terrible time using the physical camera with camera tracked plates. Is there a way to match an interval center of 0.000 and Duration of .5 with the physical camera? I tried 360 degree shutter with a -90 offset and it still looks like it isnt tracking due to the motion blur being off.

Any thoughts?

thanks
Bryan

[joconnell]

Surely it'd be a 360 shutter and a -180 offset in this case?

[Morbid Angel]

you need to set your physical camera to "movie camera" mode, and by default the shutter is 180, which is what you need. The interval center is 0.0 in physical camera already.

[shadevfx]

If set to movie camera mode, and we leave the shutter at 180 the motion blur doesn't seem to match...

Could it be some bug in 2013? I've never had this problem before working with tracked plates. It's possible something is wrong on our end as well, but I can't seem to figure out what it might be. With no motion blur, the track is rock solid. With no physical camera, interval 0.0 and .5 still looks pretty solid.

Im wondering if its the film back. Is there a way to get a user defined film back from a maya camera to a physical camera?

thanks,
Bryan

[Morbid Angel]

can you check in version 2012 of maya? also are your filmback settings differ from regular maya camera?

[shadevfx]

Yes, Syntheyes is creating it's own filmback settings, so they are a "user" setting in the maya camera. Is there a way I can apply the maya camera aperture settings to the phys cam?

[Morbid Angel]

Did you by chance when applying physical camera attribute also added camera settings attribute? I think you don't really need that. In my test, the physical camera derrives user options from maya camera anyway.

[shadevfx]

I haven't tried that... however, when doing a difference matte between the physicalCamera, set to movie camera and 180 degree shutter, and the standard camera and 0 and .5 you can see that its very different in areas of heavy blur, and almost the same in areas where there is very little movement.

So it's definitely calculating the blur differently.

[vlado]

Which V-Ray build are you using?

Best regards,
Vlado

[shadevfx]

V-Ray for Maya 2.20 official (13 January 2012)

[shadevfx]

Sorry more specifically 2.3001

[vlado]

So, which one? 2.20 or 2.30?

Best regards,
Vlado

[shadevfx]

its 2.3 sorry, I jumped the gun, and then got the correct information. 2.3001

[vlado]

Ok then; have you tried a more recent nightly build? Does it still have the same issue?

Best regards,
Vlado

[shadevfx]

we'll try and set that up, we dont use them that often, but Ill see if we can set up a test case