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:
Close rocks:
Terrain Becomes purple from a distance but is normal when it is right in front of you
After the recent Roblox update, If I’m not mistaken was today this has been happening to where, mostly every terrain material has a purple accent when viewed just a couple studs in front of you.
This bug has been occuring in studio as well as in normal games
Steps taking for bug to appear:
Enter a studio
Select terrain and add new terrain for example mud
EDIT: I am using a windows 10 i7, with an nvidia 4gb card (not sure which one) with 16bg system ram. (not sure what all info you need, hope that helps)