exported fbx with multiple textures has only one I created an object with multiple textures. It looks fine in "Viewport-Shading - Texture". When it's in "Material" mode it fully has only the first texture. It also happens when rendering. When I export it as fbx and import it to unity it also has only that oe texture. Why can it happen?
You have to assign every material to its part and not only unwrap it with the textures.