Hello,
That's what I understood. You had been very clear, do not worry.
I continued to work on my rendering.
Change the framing to less see the pavement and more sky. Change of sky in background (But much more timid than yours).
And a postprod attempt directly into C4D, not a really successful one. Added displacement and normal map on the forecourt to give more relief. Here too, not a frank success.
Sure, it's not a final rendition but a screenshot of rendering in the viewport, but it's not conclusive.
Then return on octane.
Again, not finished rendering. The computer crashed during the night, so I restarted the calculation this morning, and since it was not finished before my departure to the taf, I there also made a screenshot (which explains the noise ), With some postprod.
Compared to the previous rendered C4D, rendering octane offers a more realistic light, right? In my opinion, digging in this direction is more promising.
But what a hassle with Octane is that my Mac Pro plant regularly when I run the calculations. And for now, I can not afford to change computers.