Creating More Complex Man-made Materials - Blender 2.6 Cycles: Materials and Textures - page 218

Rename the frame BUMP . Set the Mix node Blend Type to Multiply and
connect its output to the Height input socket of the Bump node. Set the
Strength to 0.050 and connect the Normal output to the Normal input
sockets of the Diffuse , Glossy , and Anisotropic shader nodes.
16. Connect the Color output of the first Image Texture node to the Color2
input socket of the multiply Mix node; connect the Color output of the
second Image Texture node to the Color1 input socket.
17. Now add a Math node ( Shift + A | Convertor | Math ) and set the opera-
tion to Multiply ; connect the color output of the Musgrave Texture inside
the HULL frame to the first Value input socket and set the second Value
to 0.200 .
18. Add a Bright/Contrast node ( Shift + A | Color | Bright/Contrast ) and
connect the Color output of the second Image Texture node to its color
input socket; set the Bright to -1.000 and the Contrast value to 1.500 .
Add a Mix node ( Shift + A | Color | Mix ) and set the Blend Type to Mul-
tiply ; connect the Bright/Contrast node output to the Color1 input sock-
et and the multiply Math node output to the Color2 input socket. Connect
also the Bright/Contrast node output to the Fac input socket of the mul-
tiply Mix node.
19. Connect the multiply Mix node output to the Roughness input socket of
the Glossy BSDF shader.