Use more than 3 splat maps in a landscape material?

Is it possible to use more than 3 splat maps in a landscape material?

I have so far not figured out how to do this.

Yep, it is possible.

Can you give a bit more information as to how this can be done?

Not sure if your problem is same as with the layered materials, but if it is, this should remove that problem:

Hey thanks for that info. But no what I am trying to figure out is is there a way to have more than 3 splat maps in a landscape material. Currently from what i can tell you can use a max of 3 splat maps in a material.