QuickDirt is a powerful, yet easy to use dirt and aging application tool for 3ds max artists and 3D Studio VIZ designers. It exists in 3ds max as a combination Object Modifier and Map type that are used in concert. Its primary use is for adding dirt, rust, mud and other topology dependent texturing effects to mesh objects. The plug-in, as the name implies, works in (near) real time and offers interactive viewport feedback on the placement of the weathering. Besides its speed, another advantage of QuickDirt is that you can define different settings for different parts of the object, allowing you to control the final look.
Digimation QuickDirt 1.5.3 for 3ds max 6.x REG FILE