Another question, how right made grass textures?
I made my textures by tutorial (with diffuse, bump and speculars) but results not rigth. I read that need to creat Multiply and Add, but how. What is method for it...
You have a choice. You can have 'diffuse only', which is okay for objects (except perhaps for when high detail is needed). You can also have different combinations of diffuse, bump and specular, or all three. I'm not experienced enough to know when a material would not need, say, specular. I've only been making track and grass textures and always choose 'diffuse, bump and specular' because that's what the default materials use.
I have no idea what 'multiply' and 'add' are for :o