UnityEditor.TerrainMenus.ImportRaw C# (CSharp) Method

        internal static void ImportRaw()
        {
            string path = EditorUtility.OpenFilePanel("Import Raw Heightmap", "", "raw");
            if (path != "")
            {
                TerrainWizard.DisplayTerrainWizard<ImportRawHeightmap>("Import Heightmap", "Import").InitializeImportRaw(GetActiveTerrain(), path);
            }
        }