Skooma in The Elder Scrolls games, which first appeared in Morrowind, primarily affected performance, despite being regarded as a hallucinatory medication in lore. And this new mod brings it closer to Bethesda's original vision.
JaySerpa, a modder, has just released Skyrim on Skooma, which includes new skyrim scenarios and tens of thousands of different visuals, all of which have a lasting effect on the game: the character can become addicted to the substance. In the video, you can see the cheese mammoth, the "big head" mode, the chef crab, and other strange effects.
There are other similar mods out there, but none of them were as extensive as this one. Most importantly, the mod is fully compatible with any other skooma mod.