Well , thanks for your answers and also thanks for the VRay RT tip. But I didn't get what you guys mean. I just made a composite material and assigned it the materials. all of them have their "Show in viewport" option enabled. Also I tried to disable/enable "Show in viewport" in "MAP #3" and "MAP #14" but nothing changed.…
I guess it's a UV error, probably you can show us your UV layout? Also I notice that the diffuse and normal are on different UV scale, did you use different UV channel between those 2 textures?
Yeah, I think you're not that familiar with the concept of UVs, so probably you can start of do a research about "UV in 3ds max". That also one of the reason why your diffuse and normal are on different scale. Basically, UVs are how you arrange your flattened 3d objects on a 2d space.