Your welcome...I suspected that. w/ the glowy effect.   Will really add to render time also. An over saturation can also happen from caustics. I highly recommend starting w/o all the bells and whistles. Way too many people start out in Carrara using all the bells and can't figure out what's happening w/ lighting etc. Getting a mastery of what does what will really keep u from pullin your hair out.

No need to think outside the box....
    Just make it invisible.