flicker in shadows cast by objects rendered in vray

[rconover]

Wild guess Kresimir (for client that scene not rendering). Check and see if the smoke is using Fluid Mapping. If it is at 100% opacity-but the ref texture isn't available with the setup than that smoke will render 100% transparent. This has fooled me a few times-could fume log/mr a warning if its expecting something in the fluid map?

And are those fixes in 3.5.3-or is what you talk about 'newer' than 3.5.3?