How do I blend two normals in UDK?

TheAxiom

So I have two normal maps, one for my overall terrain (1) and one for the terrain materials (2).

http://prntscr.com/6l7dg6

What I want to do is blend these two together effectively. The 'add' node seems to work well but it reduces their impact. I want to use multiplies on each to increase them, but once I add that second multiply it increases the normals 10 fold as I imagine the 'add' is also multiplying the multiplies.

I've tried using the Blend_Overlay, Blend_PinLight and Blend_HardLight nodes too without good quality.

Here it is with two multiplies:
http://prntscr.com/6l7gua

And here's with one on just the painted textures without terrain:
http://prntscr.com/6l7h7a

TheAxiom

Okay so it was the multiply on the terrain one that was causing it because the terrain normal is covering the entire map, so it's adding ontop of the others and increasing them. How do I get them to blend better so one isn't increasing the others too much?

ZacD

https://sites.google.com/site/lessonsdarrenmckinsey/2-1-detail-normal-maps