Change of material according to the direction of the light rays

[Bluelikesky]

Hi,again.

I'd like to toggle the map of the earth (as seen from space) based on whether it's day or night. This means that there are 2 materials that will alternate based on the direction of the light rays relative to the surface normal. Something like raytracing for example.Is there any way to do this? Maybe in with Material Graphs?

Thank you in advance:-)

 

Edited July 7, 2023 by Bluelikesky