Hello tez12,

My P7 hasn't arrived yet so I can only speak as a P6 user for now.

Maxing the firefly render settings is something of a mistake, it adds days to the render without any visible bonus to the finished render. Using HDRI as well as full settings is probably a bit like committing suicide:)

In my experience, customize your render settings. Start somewhere low, where you can still use HDRI and work up the settings from there.

Once I found a render settings level that suited me for both speed and results I saved the setting and just load it when I'm ready to render. Don't rely on E-Frontier to have the render settings all worked out for your convenience.

Cheers,