martinuzz wrote:Indeed, tanning only works outside.
This is actually not true.
The issue with having tanning tubs inside a house is that it works like with the cart:
When you leave the house for longer than a few moments the interiour is unloaded, thus the progress will reset to 92% when you enter the house later.
So you can easily make leather quickly by preparing the tub(s), leave the house for a short while, come back to find the tubs at 92%, then idle for anoter while in the room (or do other stuff for 15 min or so, eg. a nice chat with some peeps you know) and you're done. Also no decay on the tubs.