Hi Grimm,
Another odd one: Not really reproducible.
During a render, only a few frames in, I am periodically getting sudden darkness.
Not a completely black frame, but a frame that appears as if the HDRI has shut off? In fact, turning the HDRI power to 0 in the node editor seems to give the same effect.
The objects are visible as I have a low level mesh light. I have been able to get through the render by shutting down both the OctaneRender server and Octane Blender.
Thanks for your help,
Rick
Win7 64
dual xeon
32 G RAM
970,980 Ti, 2x TitanX
Nvidia Driver -24.21.13.9764
StandAlone 3.03.4
Octane_Server_3.08_-_15.2.5
Blender_Octane_Edition_15.2.5_2.79