@gkx Thanks for your answer, but I have few more questions about materials.
1. What is two lobes driven and how do you use a flow map for horses?
I know that flow map is used in game engines for water flow simulations, but I can't understand how it can be useful for animals.
2. You said that you have a channels for black&white textures in one image so which order did you place your textures into channels? Is it editable in with engine's tools? Or artist need to pack textures into right channels in certain order?
3. Are there any objects in the game that use opacity map? Maybe plants with lightning scattering effect? If there are which channel do you pack opacity map or do you use separate files for it?
4. Also we know that game used metal/glossiness, but next you said this
How is it working? If I'm not mistaken specular and metallic are different workflows. So how do you combine them?
5. Which tools do you mainly used for view 3d-models with applied materials? Marmoset or something like that?