Select the menu item «Tools/ GIS Tech / GIS Terrain Loader / Add Runtime GTL to Scene», to open add Runtime GIS Terrain Loader Script to your scene.

A new gameobject contains 'Runtime Terrain Generator.cs' + 'GISTerrainLoaderRuntimePrefs.cs' will be created.

Note that all preferences are the same to GTL Editor. 

To load a terrain at runtime we need to create a simple script.

Create a new Gameobject and set 'GenerateTerrainFromTIFF.cs' to it.

Hit play button to get the same result.