Bad weather on The Arena

The Arena is taking shape and I spend some time on the eyecandy necessary to a Doryen game. I ported some of the weather features of TCOD to the arena and played a bit with some new ones. I'm pretty satisfied with the fog and I will definitely add it to TCOD too as soon as possible.
Each fight in the arena occurs at a random time of the day and with a random weather. It has absolutely no impact on the game but The Arena is also supposed to display the visual possibilities of libtcod.

So here are a few screenshots showing different atmospheres : rain, sunny, dawn, light fog, heavy fog, night. Each is not a unique atmosphere, they can combine : fog at night, rain during fog, ..