Right. This is what I have been doing up till now.

- I cropped invisible features underground from the central building. 
Dimensions now: <33.5, 33.5, 16.5> with z being up

- Assuming that the *magic* number 7.5 is valid for an object sized 120 pov 
units, I calculated the reducing factor for my building and used that in the 
params.

- I did the same for the basic element constituting the surrounding wall. 
Question: This object being strongly elongated, shouldn't the *scaling* of 
the bozo noise be scaled accordingly? I am not sure about that.

- From Edouard's example I deduced that the calculation of the df3 does not 
necessarily take place on an object centered at the origin, so the wall was 
calculated at its world's location. Question: Is this assumption correct?

Results for the time being vesible on the image.

-- 
All the best,

Thomas

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