CloudRendering image buffer and performance

[Mr160h]

How do I get access to the image buffer in headless mode? I might have missed it, but I don't see this mentioned in the docs anywhere (when using the CloudRendering platform)?

Should I use action["renderImage"] = True to get the rendered image? Setting it to true cuts the performance in a quarter of the performance I get with the Linux64 platform which renders to a Unity app window. I would have expected the performance to be roughly the same due to the only additional work being the copy of the image buffer over to Python?

Thanks for any help!