Vehicle Templates

I won't explain the templating process because that's a lengthy matter on its own but I'll assume you know how to do mapping in 3DS Max and point you towards that colourful function, actually referred to as normals rendering.

Modifiers > UV Coordinates > UVW Unwrap

Then find and click on the Open UV Editor button, a window will appear with the UV mapping and then proceed as follows:

Tools > Render UVW Template > Under mode, select "Normal"

Select any other options you'd like and click on Render UV Template.

EDIT:
Below is a video from a quick search, it should serve as a basic guide for you if you're not familiar with 3DS Max mapping.