Hopefully this is an easy fix.
In Keyhsot 2 I was able to apply an emissive material and as long as I ticked the 'detailed direct illumination' box in real-time then I would see the emissive light glow (lots of glow) and it would render in the same way.
I seem to be struggling with Keyshot 3 because I apply the emissive material to an object and there is no glow at all, I know you can apply some bloom but that seems like a backwards step in comparison to the previous version and not as effective. So is there a box I need to tick as not only do I not get a glow in preview mode I also don't when rendering.
Might be wrong but I think you need to increase the emissive brightness value !