This started happening as of 4th March, if you view terrain from a distance it is a different colour to that of when you are close up to it, which affects the aesthetic of some places. This occurs on the highest quality settings. This has occurred with several people, so I have ruled out setup issues with my Roblox install.
Here are some screenshots of some problematic ones I have noticed in my builds:
Mud transition from brown to red:
GPU: Nvidia GeForce GTX 1080
CPU: Intel i5-7400
Not sure how relevant this will be as it has affected my laptop too.