I’m looking for an alternative to emissive materials for shaping light projection, as UE4 has removed emissive material contribution to Lightmass.
The first obvious choice is Light Functions, but the documentation currently has only a short paragraph and an image.
Can anyone with experience with Light Functions share their experiences? Are they suitable for soft diffuse illumination (strip lights, stained glass windows, neon signs), and can they be baked into Lightmass? Are they restricted to specific Light types? Or, is there a better way to get emissive material stand-ins?