效果图

This is a part of the SpaceCity scene. Here we used a "3D Total Texture " without altering in Photoshop. This part of the scene is completely modeled using Nurbs.

贴图

I used a "2D placement node" for the tube so that the texture conforms to the shape of the tube.
The same map was used for color and bump.

This is what I have so far a simple looking metal shader, next we work on the highlight.

材质属性

Next I map the "Specular Color". We make a duplicate of the file texture "With Connections to Network". This way I only need one texture placement node. Then I connect the duplicate with the Specular Color of the shader.

Now the highlight looks a little more interesting.
Next I will try some variations on the Specular color by connecting a Ramp to the "Color Remap" of the "Specular Color" file.