Originally posted by ulzgoroth:

Originally posted by Ragequit Inc.:

You have fire. Fire make smoke. Make so smoke doesn't gather inside house. It's not rocket science.

That part's relatively clear, but what you have to do to make the chimney protect the fire from rain is weird looking and unintuitive.

It truly isn't. Cover the fire. 4 pieces + a roof is all it takes. The fire is covered.