Nali Weapons 3 is a new weapon pack for Unreal Tournament, containing over 15 new weapons, including nuclear weapons, drones, freezing and flaming guns, and the list goes on... It's also the sequel to the old Nali Weapons II X.
In the new UT v469 version is now possible to raise NW3 max settings without crashing, and the quality difference can be seen especially with the UltimaProtos nuclear explosion as seen in this video.
In other words, this is how the UltimaProtos really looks like, with a lot more fire and debris, meaning that all the media I put forward showing this explosion has been a more watered-down version of the real thing, so here it is in its full glory.
Please note that this is not new content, this is already present in the final release of the mod, but in the latest UT version available to the public this mod cannot be run at max settings without crashing at some point (sometimes immediately), that's why all the media shows the mod in normal settings and I never promoted to raise it (so what you ended up playing with was exactly what I have shown).
After UT v469 becomes public, I may add more media and guides on how to raise this mod to max settings to get this level of effects.