Stonemason's Winter Castle Material

The Management

Anyone know how this is achieved? Stonemason?

Stonemason's Winter Castle, has a material that has extra layers and user perameters that adds a slope function that lets the snow sit on the tops of things and trail off as the slope increases. The extra layers have different images, one is tiled for detail, the other covers the entire landscape seemingly using the same uv but they are at completely different scales. I'd like to know how this is achieved? How these extra layers and math functions are added? I tried the LIE, but not sure that is how this was done.
Attached an image that may better show what I am looking for.
Thanks.

Richard Haseltine

Using a Texture Tiler brick in Shader Mixer you can feed tiled values into a Texture Instance brick (separate links for RSL and MDL). So you just need one Texture Tiler for each value you need, linking it to all the textures that need that repeat.

The Management

I'm not good with nodes even using video tuts that are perfect.

So much of the information on Shader Mixer is so old and incomlpete and leads to dead ends, I'm afraid this doesn't help much. 

Thanks anyways.