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Week 8 - Oct 28 , 2011
Area Lights
Area lighting in ray tracers is done by taking multiple samples along the surface of the light. I implemented a rectangular area light and I iterate along the height and the length of the light.
The following images demostrate how the number of samples affect the smoothness of the shadows. As the number of light samples increase, the resulting shadows in the image becomes smoother.
| Wide Area Lights - Angle A |
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| 2x2 Light Samples |
16x16 Light Samples |
32x32 Light Samples |
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| Narrow Area Lights - Angle A |
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| 4x4 Light Samples |
16x16 Light Samples |
64x64 Light Samples |
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| Narrow Area Lights - Angle B |
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| 4x4 Light Samples |
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| Narrow Area Lights - Angle C |
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| 4x4 Light Samples |
6x6 Light Samples |
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