Demo link: https://youtu.be/rw-wGZ1Z9E4

Set up Guide: https://youtu.be/3j1jAAxQtzs

Above asset contains a blueprint to create an endless runner with Parallaxing layers and Day/Night Cycle, Everything in the blueprint is customizable and is made instance editable.

Frame rate independency is achieved and is tested from 10-120+ FPS.

The asset also contains various materials:

Background sprite is fully recreated as a gradient of any three colors and dynamically changed based on the time of day, Also you can opt out of this function from the editor itself.

Layer Sprites have few parameters to change their darkness value over time to achieve the night effect, this is also optional and can be opted out in the editor itself.

Starts opacity can also be altered based on the time of day.

As for the blueprint: It contains the script to parallax all your layer with user-defined speeds in reference to the camera movement, Also the layers are swapped rather than being spawned and destroyed to unnecessary draw calls and save memory, These layers snap back and forth based on character movement direction.