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Close but wrong. The luxrender slave process does all the disk access, so whatever user it is running under needs write access.

I run my luxrender slave process on startup under a lux user with it's own home directory. That home directory is not shared in any way with the master computer.

 

Well.. fwiw.. network rendering worked not at all for me until I did exactly as I had outlined.  I set up permissions for my slaves and still got nothing.  Then I set up permissions for my master computer and it was off and running