How to make a sprite glow?

Hi, I'm making a 2D game with pixelart style, and I was wondering if there's any way that I can make a sprite of a prefab glow/emmisive, so that other sprites react to the lighting that the prefab is emmiting. It should look something like this:


Is there a way to achieve this in prefabs? For example, glowing bullets...

 

2 prefabs one lit one not

 

You have several options:
- make some glow directly into your image asset in your painting program. This will not make any impressive effect, but it is cheap,
- make planet without glow and then separate image for glow. In game draw planet and then draw glow over it with additive blending,
- play with HDR / Bloom (Post Processing). You can create emissive shader and then set bloom parameters so, that parts with intensity higher than X will glow. If shader takes mask, then you can let glow only specific areas - see image below (whole sun is custom shader that simply doubles intensity, deers are using emissive shader with mask for eyes):



Emissive shader used above - here is Shader graph for emissive shader. It is simple sprite shader and emission color is added where mask says:

 

This one was really helpful, thank you!