The intended Nirnrest experience. Muted, atmospheric, and comfy visuals. Easy on the eyes.

Use this version if you absolutely cannot use the main version.
(Exclusion of sunrays can add 5-10 frames, but IMO it detracts a lot from the jaw-dropping smooth eye candy achieved in certain weathers.)

Uses reforged bloom.
Use this for a more fantasy-like experience. Deeper colours, more modern, intense, and stylized lighting.
Note that this version can have undue performance hit and be generally unstable on some systems.