Problem with Tyflow: random particle colour works with IPR but not production render

[fixeighted]

I have a confetti cannon with a VrayMultiSubTex on it. It renders fine in IPR but not at all using either bucket or progressive for finals.
Am I missing a switch somewhere or is it something else?

EDIT: I should add that the option I choose is random by element

[hermit.crab]

Thanks for the report. I've reproduced the issue and logged it (internal bug-tracking id: VMAX-10998 ) for developer analysis. As a workaround, add a Material ID node to the tyFlow network and use VRayMultiSubTex's Random by Face Material ID mode.

[fixeighted]

Ah ok, thanks, that will work for me.