Why does glow stop working with a black clear color?

[blackears]

Godot Version

v4.3.stable.official [77dcf97d8]

Question

I’m creating a game that takes places in outer space, so most of the background is going to be black. I’d like to have glow effects, but they only seem to work if the background is some color other than black.

Here I’m using a WorldEnvironment with a custom clear color and I need to make the background at least a dark grey to be able to see the glow. Is there any way to do this with a black background? (The cube is using a default StandardMaterial with emission checked and the emission multiplier set to 10)

[pennyloafers]

Maybe it’s the blend mode? And or bloom amount?

Environment and post-processing

Black is zero so if it’s a multiplier effect it will get zeroed out. You can still see it in the gizmo lines and grid.