Input file 1 (different specular exponent for each sphere)

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Input file 2 (a torus made of 61 spheres)

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Input file 3 (another torus, spheres change colors)

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Input file 4 (a triangle casting a shadow onto a sphere)

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Input file 5 (400 random spheres)

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Input file 6 (sphere casting a shadow on another sphere)

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Input file 7 (shadows of spheres on two triangles)

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Input file 8 (this one can easily take 10 minutes or more on a slow machine)

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Input file 9 (a tetrahedron)