Okay, as expected...displace only.
Question: why are you using the universal material?

Hey guys,
I can't figure out how to achieve this effect in octane: The only thing I get with the dirt node is having it on the edges of the surface but not on the normal or bumps crevices:

Hi,
the key point is to correctly set the Power inside the Texture node, to match the efficiency of the specific light.


How is this possible?
So 0.1 it's not a standard number to normalize or "resetting" the original luminescence of the HDRI?
How do we guess the correct number to put in the ...

About the white scene, which kind of kernel are you using?
What are the Environment node settings?
Difficult to say without a direct example.

ciao Beppe


Yeah, sorry for the missing infos.
Kernel used was PT with as I remember:
2000 max samples
diff. 16
spec. 24
ray eps. 0.0001
GI clamp 1 or 10 ...

Hi jsuarez388,
in order to use this technique, you need to use the Texture/Efficiency node, not the distribution, that is designed for IES light.
Please have a look at the following screenshot:
Screen Shot 2017-03-27 at 12.42.20.jpg
you can set the Gamma of the HDR image at 1 and reduce the power ...