The emissive material
The emissive material is used on emissive surfaces like light shapes.
Its single input channel is very simple: an emissive color or texture and an emissive intensity affecting its 'power'.
Note:
A surface rendered with this material is not affected by other lighting sources and shows a constant color.
Note:
The emissive material is not a light and doesn't enlighten other surfaces. Only itself.
The PBR metallic material | Water material |