Material can't combine color and normal information on landscape layers

Hi.

I followed tutorials on landscape layer painting. I constructed a fairly simple material that consists of two color textures and corresponding normalmaps. When I plugged that material into landscape material slot I got not two, but four available layers to paint on: two for color maps and two for normalmaps. When I tried to paint color information I noticed that corresponding normalmap info was not being painted along with selected colormap.

Is there some setting that I am missing? Colormaps are set to ‘color’ and normalmaps to ‘normal’ in the details panel.

Nevermind, I figured it out. Apparently color layer and corresponding normal layer need to have the same name.