Can you send your callstack and logs from the Oculus preview mode crash that you were getting? We do have some reported issues with the Oculus Runtime SDK right now. There is a bug in our system (UE-16177) and I’d like to compare against that to see if this is the same crash.
Concerning the memreports that you sent, they don’t indicate that UE4 is taking up anymore than about 1.5GB of RAM, which is pretty standard.
You mentioned lightmass is taking up a lot of memory. Is this in the map with the landscape? Would you mind sending me a screenshot of the details panel with the landscape selected. Also what settings were the parameters you used in the “New Landscape” panel(Section Size, Sections per component, Number of components, etc)?
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