Complete rework from scratch of the Riften's Thieves Guild Headquarters (Cistern only, not Ragged Flagon), dynamic clutters, new rooms, new NPCs and a lot of secrets all around.

I reworked the custom cubemap, that one should work better (I hope)

Brighter lighting template if people don't want this sewers unlit areas to be too dark.

Brighter lighting, all light bulbs (except from the already really bright ones) I'm using have a ~50% fade value increase. May be useful for people not using any ENB for example.

Vanilla lighting template if people want to use it instead on mine.