I don't suppose you know the first step for blending two bump maps together... If you said, "Make a Blender Node!" you'd be right. You'd also be kind of psychic so there might be a lounge in Vegas that could use your newfound talents! :P

• Make a Blender node and set its Blending value to 1.
• Plug the bikini mask into the Blending value of your recently made Blender node.
• Load the bump map for the skin texture - if one does not exist just use the skin texture as the map; this is just an example, after all.
• Make a Math node and change it to Cos with a value of "2"

, essentially turning your bikini map into grayscale then inverting that color. This will be your bump map value for the bikini since we...don't have a bump map for the bikini in the first place. Daz didn't make one - go figure!

When done, the result is something like what's displayed above.