What does withInterior_forceFirstLod = false do?

I’m struggling with a livery (KLM CJ4) that I want to use with the CJ4 WT MOD and the Mobiflight wasm module and Simcionnect. This livery only seems to work when I set:

withInterior_forceFirstLod=false

in the model.cfg.

However, I have no clue what this option does. Could anybody explain that to me?

If you load the model and this option is set in this way, it will load it with interiour but without force to load firstlod because it is set to false aka not true so it might load a lower lod first.
The reason this works for you, might be that the mod u are using may have other lod (level of detail) setting and if not forced because of the false flag, makes it possible to load.