Fluid Rendering Problem

[bjohnston]

I am getting some strange artifact when rendering 2 intersecting volumes with smoke. My smoke only fills a small area of the volume, but in the alpha, I can see one of the volumes as if there is density (ever so slightly) filling it completely, instead of seeing the 2 smokes with clean alphas...

When I add a third volume...I see the first 2 volumes in the alpha.

Thanks for any hints on getting clean alphas on 2 or more overlapping containers.

I need to use Maya renderer...

[akjones]

is this with Maya 2009 SP1a or an older version? There used to be a problem with intersection fluids that that was fixed a while ago.

[bjohnston]

I am using Maya 2008 64-bit.

[bjohnston]

I also tried it with Maya 2009 with the same result...is there a setting on the fluids that needs to be unchecked?