Looks strange, not like the usual missing environment asset. But anyway:
Are you sure that the slave has access to all needed assets? Use Shift-T and check all paths (enter "ATSOps.CheckNetworkPaths=true" in the max script listener window before, or even better: put this in a script in your scripts\startup directory). All assets should be flagged as "OK" (not only "Found"). However, this looks more like some exposure/gamma issue.
Then:
- The slave max is correctly set to gamma 2.2 I presume?
- Do you have any error/warning in the DrServer window?
- Have you used batch rendering here?
- Which version of Corona and Max is this?
- Do you use a plugin which could cause it? (All used plugins have to be installed on the slave as well)
- Which view/camera is this? (perspective/CoronaCamera/PhysicalCamera...)
- Are the language settings the same on both computers?
- And out of curiosity: what's the reason for running a server OS on the node? :)
there is more noise at 250 passes then if I would render it local.
That's unfortunately always the case when using dr vs. single node when rendering the same amount of total passes.
Good Luck