For an explanation of material properties and further links, see Material properties
Emissive Material
metal_base.remt
You can make engine\materials\metal_base.remt glow by adding the correct parameters, or you can poke through the game files and search for emissive > .mi to find Cyberpunk material templates to learn from.
path to emissive texture, e.g. engine\textures\editor\white.xbm
The texture works like an alpha mask.
EmissiveEV
float, e.g. 2.0: emissive brightness. Brightness varies depending on your colour. Unless you want to actively blind people, you might want to stay below 4.
EmissiveColor
Glow colour as RGB (copy from e.g. mi_neokitsch_fridge_z_emissive.mi)