Hi Brian ,

Heres the shade tree. The glow value is 32% on low light setups I bump it to like 18% on bright scenes. I would send car file but its to big. rendo just bounces it. I tried your png it works fine but suggestion paint solid lines than gros blur them like 10 pixes you will get much better results.

The same idea is on the candle car that comes with Carrara. Also on eovia tut section.