Hi,
Here is an old scene I wanted to have try with Octane.
I only used diffuse maps, so no spec map
All renders time are below 3 min, there is some grain but I leave it intensionally
Lit by an hdr map
Originally rendered in 1024x768 and then downscaled to 800x600
Some postpro for lighting, noise reduction, fireflies removal and chromatic abberration