VraySky Shader still showing for DBR even though unticked?

[crazy homeless guy]

Anyone else have this problem?

I am using precalc’d light solutions, and rendering out a patch matte while also using DBR. In the Max environment slot I have unchecked the VraySky shader so that my matte is against a black background.

It works as expected on my local machine, but on the buckets that come back from the DBR machines are still using the VraySky shader as the background.

I am using Vray1.5sp5 and Max2011.

[crazy homeless guy]

I should mention that this doesn't happen when I completely remove the map from the Max environment slot. It only happens when I simply tick don't use the map, which I do for patch shots so I can get a cleaner edge.