Emissive Heatmaps

I just made a prop with some sweet heat maps that look amazing on marmoset, but when I use the importer to bring it into UE4 it looks terrible. What I’m doing wrong?

In marmoset looks creat (GIF)

Oh it was just a quick and dirty example. Realistically, you’d want some kind of setup similar to this(can be easily expanded on, but it get’s the point across):