Phoenix render problem : smoke flickering

V-Ray V-Ray for Maya Issues
1

Hi,
A co-worker (the FX guy) gave me a Pheonix simulation to render (with a cache) with in VRay.
I have calculated the render, but on some frame, my smoke have flickering.

Example :
Frame 64 :

Frame 65 :

Frame 66 like 64, frame 67 like 65…

I know nothing about Phoenix…
I have tried to find what is wrong, and it looks like the problem is with the transparency.

The cloud3d have default setting.
Anyone know what is wrong please ?

Thanks.

2

Skip shading level looks too high. The shading step can be too high also and miss content.

3

Ok, but it is normal that it works for one frame, another frame is wrong, another frame good… ?