Grassmaterial with blend of three textures

[3dvizual]

Hi.

 

I am new to vray and I can't figure out how to make a vray blend material of three grass textures.

 

I have one base material (texture) which should have transparency to the other two materials (textures). Which also has transparency to each.

 

So how do I create a material where i can control the blend and the amount of transparency to each other.

 

Please post a screen shot of the settings.

 

Thanks.