What is the difference between emissive color and emission in a material?

• A. Emissive color is the material property that makes it appear to emit light.
• B. Emission is the material property that makes it appear to emit light, while emissive color is the color used for that self-illumination.
• C. Emission and emissive color refer to the same property.
• D. Emissive color determines how bright the object glows regardless of emission.

Answer: (B)

Emitting light from a material has two parts: the mechanism that makes the surface glow and the color of that glow. Emission is the property that enables the surface to appear to emit light; it’s what makes the object glow and, if enabled, can even contribute light to the scene. Emissive color is the color used for that self-illumination—the hue of the glow. So the best statement distinguishes the triggering property (emission) from the color used for the glow (emissive color). In practice, you enable emission and pick an emissive color to define what color the glow is; brightness comes from how strong the emission is, not from the color itself.