Now, Im using the node DERIVEFROMZ. (I dont know how to pass the R vector from 1 texture to the B vector to another texture, but the DeriveFromZ seems to solve the problem)
Using a single texture image I get 2 color texture(B channel) and 2 normal texture.
In this case with only 4 image files we get 8 color + 8 normal.
Total:
5+4= 9/16 TEXTURES SAMPLERS TOTAL
Is needed some grunge or dirt map textures to aply to the color.
Another problem is that some images must share the same LandscapeCoords node.
¿should be another better way to do it?
Help & suggestions & properly nodes.