MotionSquared.net posts a look into creating an inner glow effect on 3D objects in C4D. The tutorial covers using splines and lights together to strategically place the glow effect wherever you like in your scene. Done also offers some tips for getting a better look to the inner glow effect.
Check out the tutorial for Creating an Inner Glow Effect in Cinema 4D here.
There are probably a few more ways to create an inner glow effect like this in C4D, but this method will likely create the effect without a great hit on render times.
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