how to setup fogSettings

[Hyradus]

Hi all,
I am using the latest TerriaMap cloned from this repository and I am trying to set the fogSettings but I am struggling to understand where needs to be added.
Here is mentioned that has been added to initsource. I have tried to add "fogSettings": {"density": 3.0e-3, "screenSpaceErrorFactor": 1},:

• to the catalog loaded by the config.json -> no error, but also not working, even with different values,
• adding it directly in the config.json -> no error, but also not working,

I have also tried to look at the files mantioned here but there are completely different.

So my questions are:

1. where I need to add the fogSettings?
2. is it possible to disable it as default?

Thanks in advance