VDB velocity relative to camera not calculated properly

[Jonathan_Laborde]

Hello,

I have noticed something strange. I have a plane going at high speed with a camera tracking it at about the same speed. A smoke element coming out of a wing has been simulated and cached at rest position and then transformed to follow the wing. Problem is, when I render it the motion blur is a long streak as if the high speed motion coming from the camera has been added to the vdb. Without transformation blur the local velocity from the simulation renders correctly.

The same setup has been tested with particles and the problem is not present.

Anybody has an idea of what is going on?

Houdini 17.5.528

HtoA 4.1.0

Thanks