Which term describes the decrease in light intensity with distance?

Which term describes the decrease in light intensity with distance?

• A. Bezier curve
• B. Diffuse color
• C. Keyframes/keys
• D. Attenuation

Answer: (D)

Light fades as it travels from a source, with intensity diminishing as distance increases. This behavior is described by attenuation, which captures how strong illumination gets weaker the farther you are from the light. In practice, attenuation is often modeled with constant, linear, and quadratic terms to simulate this falloff, matching the real-world idea that light intensity drops off with distance (the inverse-square principle) while giving artists control over how dramatic or subtle that falloff appears in renders. Bezier curves are used to define smooth paths and curves for modeling or animation, not for how light strength changes with distance. Diffuse color relates to the color of light reflected off a surface under diffuse reflection, not to the change in light intensity with distance. Keyframes or keys are markers for animation timing, again unrelated to how light attenuates over distance.

Light fades as it travels from a source, with intensity diminishing as distance increases. This behavior is described by attenuation, which captures how strong illumination gets weaker the farther you are from the light. In practice, attenuation is often modeled with constant, linear, and quadratic terms to simulate this falloff, matching the real-world idea that light intensity drops off with distance (the inverse-square principle) while giving artists control over how dramatic or subtle that falloff appears in renders.

Bezier curves are used to define smooth paths and curves for modeling or animation, not for how light strength changes with distance. Diffuse color relates to the color of light reflected off a surface under diffuse reflection, not to the change in light intensity with distance. Keyframes or keys are markers for animation timing, again unrelated to how light attenuates over distance.