Hi, thanks for the fast answer,

actually we found out why it did'nt work (apparently the original v-ray presets overwrite the script, so we used the vray presets and now it renders just fine), our original problem wasn't solved though. As soon as we try to render more than one frame (using batch render or your script) some parts of the model don't move accordingly to the animation (weirdly enough that doesn't happen in playblast)...

We haven't found a reason for this yet (probably just some corrupt files), but your script still has helped us a lot, so thank you!!