particle flickering

[chris_img]

Hi, this mighht be a phoenix issue (or a combo) but i'm getting some strange flickering in my phoenix setup. I've attached a mov showing the flicker.

The setup is 2 particle shaders firing at each other and meeting in the middle. It seeme to me to only affect the red particles but that could be a red herring, infact it looks like the 2 systems sharing the same 3d space and its choosing which one to render infront randomly. I'm not using gi.

Has anyone seen this behavior before?

[chris_img]

I'm going to try reducing the Volume Light Cache Speedup on both the particle shaders & see if that helps.

EDIT: It did not. same flickering as before.

[hermit.crab]

Does setting a small "Secondary Ray Bias" (Render Setup>V-Ray>Global Switches) value (i.e. 0,001) make a difference? If not, do send the scene so we can take a look.

[chris_img]

I'll give it a try, thanks.