How to set Landscape LOD Defaults?

I have a tiled landscape and I’m generating LODs through the Level Details panel. The problem is that the defaults among other settings have Specular set at 0.5. While I can set this to 0 and generate my LOD, I have a ton of landscape tiles to do this for and it’s getting tedious.

Is there any way I can set these default values or control how materials are applied to generated LOD levels?

Thanks

I know this is an old question but I have the same problem, that’s a lot of settings to change for each landscape tile. We should be able to change the default values as global parameters.