Seems very helpfull, thank you very much!

To align objects to point straight up change "Normal Align" to 0.
You can control slope scattering changing min/max sliders in "Normal Threshold".

Try changing Gamma to 2.2 in Camera Imager (it's the proper gamma to use with Linear response in LV).
With a value of 1 you are viewing your render brighter in LV, so maybe your are setting your ilumination too dark.

@Frank you are right. This was intentional as the idea behind was to simulate a sort of maquette.

@Hutton Basically all models in scene are low poly (tree leaves are just planes) except vehicles and nearby mountains, which were sculpted a bit.
All the materials are procedural, I abused largely of ...

In this tutorial, Moritz shows how to create clouds inside houdini and bring them to C4D for rendering with Octane.
http://www.entagma.com/quick-vdb-clouds/

Displacement don't work well with tiles. Try if you can get good results using it in the Bump channel or better convert it to a normal map.

Thank you guys for your kind words.

Try connecting the noise node to a color correct node and decreasing the power (Brightness).

Infographic for a company of industrial valves and fluid control.

It's R2