I found a solution - MIX materials by color vertex attribute works just fine and it is a reasonably efficient way to procedurally control the intensity of lights

yes, but I can't truly control the intensity of the light cause when I plug my attribute to the distribution pin if the value of my attribute is 0 it still keeps sort of the dim light in the scene despite the light sources are not visible, see the attachment. And if I plug that into the efficiency ...

Is that possible to read point/vertex/primitive attributes to drive "power" parameter in the blackbody emissive shader? I tried everything in all combinations possible with no success. Help me, please

Thank you,
here is the file

yes unfortunately it didn't help this time

Octane disables bump effect at a certain distance from the origin, approximately 1500 units. Is it possible to keep the bump on the whole geometry instead without being tied up to the distance from the origin?

Thank you so much, Juanjo for your guidance! Works like a charm!

I'm just beginning using the Octane and I faced some problems - triangles appear across the surface of the mesh that becomes even more obvious on a large-scale scene. Even if I make the mesh denser, let's say 100 times denser, the triangles don't go anywhere - they only become smaller. The same ...

Thank you so much for your reply, it helps but there are still some gaps. Is there anything that can fuse them?

The displacement creates the gaps between the UV seams whereas I want them to be fused. Is there anything that helps get this around?
Houdini 18.5 Octane 2020.2.5.0