Alongside the fully adjustable camera mod for Kingdom Come: Deliverance, we have another must-have mod but for Fallout 4. Fallout 4 Ultra Interior Lighting mod is a comprehensive lighting mod that brings you many more shadow lights and a general improvement to overall lighting, ambience and fog to the interiors of the Commonweatlh, Far Harbor and Nuka World.
Created by modder ‘gargorias’, this mod increases the total amount of shadow cast lights in most of the interiors of the game from 10%-40% to 80%-100%, thus creating more believable and realistic environments.
Moreover, many lighting bugs have been addressed. More complex levels/scenes have been optimized with a triggered lighting system, and some adjustments to the fog settings and the overall ambience settings have been made.
According to the changelog, this latest version of the Fallout 4 Ultra Interior Lighting mod packs more performance improvements using the triggered lighting system, improves the lighting and corrects some minor issues across many interiors and addresses some XPRI issues in the Nuka World cells.
Those interested can download the mod from here, and below you can find some comparison screenshots.
Have fun!

John is the founder and Editor in Chief at DSOGaming. He is a PC gaming fan and highly supports the modding and indie communities. Before creating DSOGaming, John worked on numerous gaming websites. While he is a die-hard PC gamer, his gaming roots can be found on consoles. John loved – and still does – the 16-bit consoles, and considers SNES to be one of the best consoles. Still, the PC platform won him over consoles. That was mainly due to 3DFX and its iconic dedicated 3D accelerator graphics card, Voodoo 2. John has also written a higher degree thesis on the “The Evolution of PC graphics cards.”
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what on earth? My vanila version doesnt look this good.
This clearly adds shadow casting for lights. And maybe increases the power or effect of the light sources and tweaks some fog stuff.
dude making things darker isnt an improvement.
So you didn’t check the mods eh?
It’s not about making things darker, it’s about removing artificial light sourcers, so that the only ones casting lights are the actual light sources.
The mod in this article seems to over-do the existing light sources, and making some of them too bright, it just looks worse than the other mods.
It needs to be realistic.
The irony here is that none of the mods you linked replace artifical light sources. (one just removes some of them) Durka durka is right, they just adjust different settings to make the game darker, and even state so in their descriptions.
Take it from someone who has actually modded this game; the mod in this article actually replaces simple point lights with proper directional ones that cast shadows naturally. The mods you linked are pretty basic tweaks in comparison.
If you really can’t see the new shadows in the screenshots I don’t know what to say.
Until recently I had this mod installed but then removed it once ELFX made it to version 1.0.