Lightsource used in Wynncraft?

Does anyone know what lightsource is used on the paths and in the cities? It seems to be an invisible source and it mostly lights up the floor. I'm using floodfill on my shader and it doesn't seem to register the block as a lightsource so i'm trying to fix that. Thanks in advance!

 

Light block?

 

It's a structure void

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Not all structure voids are light sources, so if you just try to set structure void to light source, you'll end up with a shitload of random lights showing up that are there for region detection or moving block stuff

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Light blocks don't exist on Wynn, as there are no blocks from newer versions

 

That’s cool

 

aw ok, thanks for letting me know. Guess i'll just have to turn floodfill off then