Deeper works to generate normal maps FROM Carrara Geometry. It also was able to render normal maps as texutres prior to that function being embedded in Carrara. 

So, you can use Deeper to 'take a picture' of your scene to generate normal maps to match and enhance exising geometry. 

However, if the goal is simply to create texture maps that also have a normal map bump included, CrazyBump is super. That's what I use.