smuseusYou should have a GUI that looks like this in Indie. I use Indie at home and I get a GUI, unless your referring to something else? LOD Groups were added to Houdini Engine after 16.5.477. I hope this helps!
How do I turn on “Use LOD Groups” with the Indie version of Houdini-Engine for Unity?
Since there's no GUI I can't access the ASSET OPTIONS that are references in the documentation
http://www.sidefx.com/docs/unity/_meshes.html [www.sidefx.com]
Glen