Fog

Today I learnt about Fog.
Fog can be added through the rendering > enviroments option. you can change settings for how thick it is, where it starts and where it stops as well as the colour.

There is also Volume fog the allows you to create fog in a certain area using a gizmo. this is good for adding fog into small areas, with these pictures I added a Fire effect that uses the same type of gizmos as the volume fog.