Hi @Omar Domenech, @dillenbata3 & @SFE-Viz!
With the combination of your solutions, I was able to solve the problem!
1. Threshold was too high, so I reduced it greatly.
2. Cranked up the emissions more.
3. Set compositor to “Camera”
Seems with Blender 4.2, the settings to change Viewport Compositor has changed.
Please see screenshot for final settings and result!
Thank you for the awesome helps!

Final Settings and Results!
