Exports splatmaps (control maps) from TerrainData object.
If resolution property is set to 0, then exported texture size is read from the TerrainData.
Note, if exported Splatmap textures are saved on the hard drive, make sure they use uncompressed image formats.
If texture exporter methods are used in the run-time builds, make sure Terrain Textures Exporter shader is inside the Always Included Shaders array of the Graphics Settings
