There seems to be an issue where Roblox Terrain merging between its different materials is happening differently in studio to how it occurs in the live-version of the game.
I’m not sure if this a newly enabled feature or a bug.
Thanks for the report. We’re not gonna be able to easily compare how the terrain looks in Client vs Studio if we only have access to the client version. Would you be able to provide a minimal .rbxl file as a repro? You can also provide it in a PM if the data needs to remain private.
I’m guessing this difference was due to an old bug with the Studio Beta for Unified Lighting, which was fixed. Can you confirm that the differences between Client and Studio are still happening?