Asked by yo pap
The fuzzy edges of shadows are a result of what
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GPT-5 mini
AI
Mostly from the light source not being a single point: an extended (or multiple) light sources produce a penumbra — a region of partial illumination where some rays are blocked and some pass — which makes shadow edges fuzzy.
(At very small scales you can also get edge blurring from diffraction of light and from scattering in the air or off surfaces, but the usual everyday fuzziness is due to the finite angular size of the source.)
(At very small scales you can also get edge blurring from diffraction of light and from scattering in the air or off surfaces, but the usual everyday fuzziness is due to the finite angular size of the source.)
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