Ah. Well then. I will try it on a windows machine then.

Any idea if and when a Mac build will be released for High Sierra? (I suppose I shouldn't be surprised if none is in the works given the lack of driver support in Mojave).

It does not. I have also tried: fresh scene, upgraded plugin, Fresh scene, un-upgraded plugin. (And the usual things - rebooting my machine, using an older version of Unity. etc.

Oops - typo: "PRM Render Target" should be "PBR Render Target".

Hello

I've been trying all sorts of things over the last couple of days since I subscribed to Octane 4.0.

Setup to replicate:
OSX High Sierra
Unity 2018.2.17f1
Octane 4.0 (new monthly subscription)
OctaneRender for Unity Install Scene (fresh download)
Octane Plugin - installed latest 1.2.0.1362 ...