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I am running Arena Expression version 1.6.1000, streaming the example animation from the latest goodypack to Motionbuilder 2013, running the latest optitrack plugin from the website.

The facial markers move properly, but no head rotation data is transmitted (the 4 head markers are not moving as well as the optical root in MoBu), as it is in the example video. Instead the facial animation appears in motionbuilder always staring straight in one direction.

I've tried many possible combinations on checkboxes enabled or not in the Arena stream settings but never could stream head motion.

Any help would be appreciated.

Thank you !
Huseyin

In the options for the OptiTrack Optical there is a check box for "Arena Expression" make sure that is checked.

Then in Expression, on the Stream tab, try toggling the "Local Marker Position" option.

Thanks a lot for the quick reply.

It worked by doing this :

- toggle "Arena Expression" in OptiTrack Optical device properties in MoBu
- toggle these in Arena :
[v]Right Hand Coord
[v]3D Marker Positions
[v]Local Marker Position
[v]Rigid Body Data
[v]Skeleton as Rigid Bodies

Glad to hear you got it working!