Which of the following is NOT a function of the Paint Texture tool?

The Paint Texture tool in Unity is primarily used for texturing terrains in a scene. This tool allows artists to apply textures, modify the terrain's color, and change the terrain material to achieve the desired visual look of the environment.

The option stating that it adds height to terrain does not fit within the typical functions of the Paint Texture tool. While height modifications to terrain can be performed in Unity, this is typically done using the Terrain tools designated for sculpting, such as the raise or lower terrain functions, rather than through the Paint Texture tool, which is focused on the application and manipulation of surface textures only.

Thus, the correct answer is that adding height to terrain is NOT a function of the Paint Texture tool.