Moving grid creates wrong motion blur

[LarsSonparsson]

I'm creating a flamethrower.
The grid is linked to the emitter object which is creating fuel and temperature.
Same object is used to burst particles, which are also creating fuel and temperature.
Motion Inertia is on.

Simulation looks fine, but somehow the grids movement is visible in motion blur.


See attachement:
Fire and particles are moving to the direction of the arrow.
Grid is moving up and down.

Tested with:

phoenixFD_adv_30502_max2018_vray_30_x64_27920
phoenixFD_adv_30502_max2018_vray_30_x64_27954

[LarsSonparsson]

...or maybe I'm just stupid...
When using adaptive grid, I don't have to link the grid to the emitter object. No moving grid, no motion blur problems.