How to create an IDMAP and example how to use it

[Tutorial for creators]

In the video below I show how you can make an IDMAP quickly in blender. It is very useful for the texturing process to select quickly each material (face).

And then I show how to use it in photoshop, color the part you need by using this IDMAP or create vector masks quickly !

If you are a texture artist you can fast forward to 1:34. Usually I include this map in my PSD files.