How can create a material with multitexture?

I have created a terrain but when i go to assign material i dont know what material use


i want a texture with 2 textures: terrain.dds and detail.dds

i have changed the uv maps in the channel 1 and channel 2

but when i go to rfactor the channel 1 is the same with than the channel 2.


this is what i want:

 

That's only a scale problem with detail map or am I missing something?

 

what type of shader need use to get this effect? i want share 2 textures a terrain map and a detail map but rfactor 2 have multiples shaders t1 + t2, t1+add t2 ... etc

 

Maybe is better post the textures.

To get this effect, or closer, you can do in several ways.

Blend textures with Vertex vertex Alpha
If you have a dense mesh can use Vertex Alpha to blend between two textures (green and brown areas ) . The term is "lerp"
(Linear interpolation). The most simple shader is (T1 lerp T2 vertex Alpha). If vertex alpha in mesh is 0 you see T1 if is 100% you see T2. The Grass infields works the same way but better. (Can use Multiply, Specular and bump also use mask).

The other way and simple way is using a large image for detail (Mul). If you have a large image (like satellite) can blend all terrain. The basic shader is: (T1 mul T2) .
T1 can be large texture and T2 the detail grass. But if want a variation in color the T2 must have little color or black and white to get color from T1. Can test in Photoshop using Blend mode (Multiply).


I hope my GoogleEnglish helps

 

thanks guys, the blend textures works perfectly: Blend textures with Vertex vertex Alpha