The Rig skybox

This skybox/vista while looks simple, there are a few problems I needed to solve.
Since all of the material in the vista are non-physical (won't react to the sunlight) I have to bake the sunlight and shadow directly into the textures. This saves a lot of the memories because there is no need for additional lightmap texture. It also saves performance since all of the geometries are not lit.
I also did part of the sand wind texture and animation.