Emissive textures

On ZBrush Central I noticed a couple of the Dominance War entries used emissive textures. Pressumably these were used to place lit up areas on the model.

I was wondering if Blender has anyway of doing the same thing using a similar texture.

Check out these entries for examples:

http://www.zbrushcentral.com/zbc/showthread.php?t=058895

http://www.zbrushcentral.com/zbc/showthread.php?t=058353

You can map an image to Emit. Which would cause the colored parts of the image to act as emitters on the material. Checkout this thread by BigBad from a few weeks ago:

http://blenderartists.org/forum/showthread.php?t=121146

Ah! he called it a glow texture! Awesome model! thanks again Matt!