Unity 5 procedural skybox with working bottom

Hi ,I am working on a unity 5 game and want to know if there is a way to make skybox with a dynamic bottom (meaning the sun and shading works on the bottom of the skybox just like the top).

If it can be done with out editing large scripts (ie: shaders) that would be best.

EDIT: i would also need the horizon effect disabled.

Would this asset be of any use?

Any searches in the asset store with the relevant tags would probably find a better package.

if you want the skybox to have a procedural effect, simply make a child under your character controller.