Hey Dr Sassi,
Unfortunately, I need to deliver today so I won't have time to upload and still have time to render the sequence out. Shame but thanks for the willingness to go to that extent of help! Appreciated.
Everything is set correctly. Rendering fine without motion blur and at the correct frame rate. AOVs and passes are all rendering fine. I'm stumped.
I've tried exporting the simulation from Houdini but still get the same results.
If I find a solution, I'll post the results here. For now, I think I'll have to try and make Resolve's motion blur work...
Thanks for your help regardless.