Robin:
sorry i cant share the project.
Belly:
not running out of ram, its using 42 out of 64. it hasn't crash anymore but it renders black unless i turn off displacement then it renders fine. maybe when it crashed i did ran out of ram, i might have had another session of max running, not sure.
same scene without touching anything i can open it in daily 2015-10-09 and renders perfect. something was changed after that release regarding displacement.