Rendering bloom with an alpha layer in Eevee is not straight forward – but it’s not that hard either. This tutorial assumes you’ve already made the smoke, and are now hunting for that elusive transparency.
Eevee + Alpha : Bloom

Rendering bloom with an alpha layer in Eevee is not straight forward – but it’s not that hard either. This tutorial assumes you’ve already made the smoke, and are now hunting for that elusive transparency.