"Masking/other render elements coming out mixed with some other kind of image - like focus sampling mask or beauty"
To all users experiencing this:
1) Make sure you are not using V-Ray cameras in your scene, or any other part of V-Ray or other renderer. In case you are using a V-Ray camera, or any other non-native 3ds Max/Corona object, please remove it, and see if the issue persists.
2) Is V-Ray installed on your render node(s)? If so, please try re-installing V-Ray, and see if the problem persists. If it does, please try uninstalling V-Ray completely on the workstation and on the node(s). Then see if it helps.
3) If none of this is helping, please contact us here
https://coronarenderer.freshdesk.com/support/tickets/new with a description of the problem, example image of what you are getting, and all DR logs - here is how to get them:
https://coronarenderer.freshdesk.com/support/solutions/articles/12000002065Just a note: we are not sure if this has anything to do with V-Ray, but it seems that in at least two cases the solution was to either re-install V-Ray, or to stop using V-Ray camera. It could as well be a false trail, but in such case maybe we will be able to find the correct one.
Another idea:
Make sure there are no leftovers from an older version of Corona on your PCs - go to Windows "Programs and Features" list, uninstall Corona Renderer, and then install 1.7 again. Make sure 1.7 is installed on all computers taking part in DR, and make sure that you are using DR server 1.7 on all of the nodes.