This is a copy of original "Terrain Texture Replacer" (by hyperdrive_engage)
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=416966387

Original MOD was deleted by the author after it was no longer updated.
Another Modder "Holy Crab" is creating the same MOD.
TTR - Terrain Texture Replacer
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=811664974

This mod doesn't work for me as it gives me this error upon map load.

The Mod E:\Steam\steamapps\workshop\content\255710\877394445 [TerrainTextureReplacer.dll] has caused an error [ModException]

Details:
System.TypeLoadException: Could not load type 'ColossalFramework.Steamworks.PublishedFileId' from assembly 'ColossalManaged, Version=0.3.0.0, Culture=neutral, PublicKeyToken=null'.
at TerrainTextureReplacer4.TerrainTextureLoader4.OnLevelLoaded (LoadMode mode) [0x00000] in <filename unknown>:0
at LoadingWrapper.OnLevelLoaded (UpdateMode mode) [0x00000] in <filename unknown>:0

If I am able to get it to work, what do I do with it and how do I do it?

Thanks if anyone can give me help with this.