I did some thorough testing of Octane yesterday on my old lamborghini model,
I used mostly materials from the livedb (paint, metals, carbon fibre, etc...), the rest are all turbulence based procedurals (leather, plastics)
I rendered all 3 at the same time on a GTX580 in 3-4 hours with the PMC render kernel.
They are pure output, no post-proc, noise or firefly removal of any kind.
They came out ok so I thought i would post them in the gallery

Radiance