Is there a way to control using a script or a combination of scripts to simulate day to night transition? I am looking for not just a texture animation but also the color of lights.etc
Besides there being solutions for this issue in the asset store - this and that - you can of course do it manually via script or animation, although it’s not easy to get realistic behavior a-la CryEngine 3.
Your algorithm should be able to generate (or at the very least alternate between) skyboxes or clouds (the asset store solutions both use layered alpha-cut planes to make ‘volumetric’ clouds), change the color and angle of the light according to the time of day and the longitude/latitude coordinates etc.